Illustrations of the recent conchology of Great Britain and Ireland, with the description and localities of all the species, marine, land and fresh water

102 MOLLUSCA. [CoNCHACEA. Rackett P· 4!); Tellina Fe-n-oe11sis, Maton and Rackctt, P· 49; Tellina fai·vensis, Monlagu, p. 55; Tellina t1·ifasciata, Donovan, II, pi. 60. Shell transvcrscly oblong-ovate, somewhat subquadrangular; oblir¡ucly subtruncatcd at the anterior si~e; from the b~e of the truncation lo the umboncs runs an obhquc, elevated ridgc, whcre it forms an anglc, and rcndcrs ali the striro above it angulatcd, ami moro rugosc than on olhcr parts of the shel~; and with longitudinally oblique striro; compresscd, fincly slrz- ated transvcrscly; umbones oblusc, nearly central; surface clcgantly radiated in sets of from thrco to six, with cleep crim- son an<l whitc allernating, ancl these are frequently crossed by two or three fillcts of crimson; two cardinal teeth in each valve, but destitutc of lateral oncs; inside bluish-white, or pale lilar, somclimcs of a <lclicate rosy lrnc; margin plain. When perfect, the external surfacc is covercd with a vcry thin yellowish-brown epidermis. This h:mdsomc spccies inhabils many of the san<ly shorcs of Britnin and Ireland, ami cspccially prevails on both sidos of thc Irish Channel. 2. PsA~IMODIA VESPEn·rtNA, pi. XL, f. 3. Psaminobict vespei·ti,w, Firsl Ed., pi. 16, f. 3; Turton, I3iv., p. !)2, pi. 6, f. 10, young; Solen vespcrti1111s, Maton ancl Hackctt, p. 4 7 ; Tellimt va1·iabiles, Donovan, II, pi. 41, f. 2 ; Telli111t d1!prcss1t, Pcnnant, IV, p. 87, pi. ,17, f. 27; Sw1guinola1·ia ves- ¡,crliua, Fleming, p. '1G0; Gob1·a111s vespe1·ti1111s, Lcach, MSS., I'· G. Shcll transversely ohlong-o,·alc, rounclcd al both sidcs, mode- ratcly thick, ami subcomprcsscd; umboncs rather small, and ~itualc ncarly central; surfocc whitc, or pale llesh-colourcd, cnvcrcd wilh vcry fine, conccntric slriro; with numcrnus radia- tions of red, or ¡rnrplish-rcd, disposccl in single, cloublc, or m1merous rays, from thc umbones to thc base; two teclh in onc valvc, ancl one in thc other, with a strong projccting lamina in both vah-cs; insiclc smooth, glossy, and for the most part pnrplc of cliffcrcnt. clcgrecs of intcnsity in ,·arious inclividuals, hut gencrally of a clccpcr hue in young shclls; some are pale piuk, bluish-whitc, 01· orangc; sometimos with two rays below thc nmbo; margin plain, bcautifully strcakccl wilh thc prcrnil- ing colonr in some spccimcns. Length an inch and Ít\'C• ,iighths ; and two inchcs ancl a half in brc:Hlth. A small ,•aricty of this spccics is fouucl al Loch Ryan, Scol- lancl, with thc sicles more roundccl; ftrst noticecl by William Nícol, Esq. Fouml al Fahnonth, Cornwall; Kingsbriclgc, Devonshire; Poolc ami Wcymouth, Dorscrshire; the Irish Channel, of a largc siic; in severa! sil nations on thc Eastcrn coast of Ircland; ami the Frith of Forth, Scotland. 3. PsAmtOlllA TELLl:-ELl,A, pi. XXXIX, f. 30, 31. Ps11mmobitt tcllincll11, Forbcs, p. 55 ; P s111mnobi<i jloi·itla, Turton, Dh·., p. 86, pi. 6, f.!); Flcming, p. '137. Shcll lransl'crscly oblong•ol'alc, equally ronndc<I at both sidc,, a liulc com·ex; umboncs placed nearly central, ancl but slightly produced; colour palc blnish-,·iolc!, with longi tudinal rays of rcclclish-purplc, or brownish-pnrple, cro5sccl by rcdtlish zoncs of the same coluur, or ahernating with slraw-ycllow; hinge with a single clcft tooth in one rnh-c, an<I a cal'ily 011 cach si,lc for the rcccption of thc two tccth of the opposile \'ah·c; insiclc palc ycllow, or rich rcdclish-purplc; margins quite plain, and rather sharp at thc edge~. Length half an inch ; brcadth onc inch. This specics is much more innated than P. vcspei·tiims, whcn of this sizc, and more angular al the sidcs; and diffcrs materially in thc teeth. Found on the ,1/estern coast, ancl Portmarnock, Ireland. 4. Ps,urnon1A POLYGONA, pi. XXXIX, f. 33. Psainmobia polggona, Turton, I3iv., p. 96; Flcming, p. 439; Tellina polggona, lVIontagu, Sup., p. 27, pi. 28, f. 4 . Shell subovate, suborbicular, subcomprcsscd; umboncs ferru- ginous, small, subcentral, ami inclining lo neithcr side; shorter side somewhat trunca!ed, and slightly angulated; largcr sidc wcll rounded ; colour cream-whitc, with very fine conccntric stri¡:c, which are decussatcd by cxcessivcly fine longitudinal stri¡:c, ami are invisible withoul thc aid of a strong lens; inside dull white; margin uneven ; two largc, distant teeth in one valve, anc\ one very large, biftd, triangular tooth in thc othcr, with a vcry small approximatc one. Length half an inch ; brcadth somewhat more. Drcclged off Cramoncl Islam\, Frith of Forth, by Caplain Laskey. 5. PsAMMODJA cosTULATA, pi. XXXIX, f. 34. Psammobia costulata, Turton, Div., p. 87, pi. 6, f. 8; Fle- ming, p. 437. Shcll trnnsvcrsely oblong-ovate, thin; slightly angular at thc anterior ene!, which is provicled with about twcl\'C fine, obliquely longitudinal ribs, radiating from Lhc umboncs, which are ncarly central, slightly produccd, and not inclining to either sidc; colour varying from pale ycllow to clccp purple, and marked with crimson blotchcs ancl stripcs; whole surface covered with exlrcmcly fine, longitudinal, and transvcrse slri¡:c; inside of !he same huc as thc exterior, ami gencrally more vivid ; in onc valve a slight.\y clcft tooth, which locks bclween lwo cardinal tecth in the oppositc valve, one of which is slightly bifül. four specimcns of this bcantiful shell wcre taken by thc dredge in thc Channcl ami in Torbay, by Dr. Turlon; thrce of thcm alivc. 6. PsAM)IOBIA JUGOSA, pi. XL, f. 4, 5, G. Psmmnobia jugosa, First Ed., pi. 16, f. ,1, 5, 6 ; P sammobi<i fmgilis, Tnrlon, lliv., p. 88; Flcming, p. '138; Tellina j11goi!a, Drown, \V crncrian !lfom., II, p. 50G, pi. 2•1, f. 2. Shcll transverscly oblong-ovate, modcratcly strong, rat.hcr inílatcd; of a brownish-ycllow colom; anterior side acuminated, ancl pro\'idcd wilh an elcrntcd, rapidly cnlarging riclge, cmana- ting al the umbo, ancl tcrminaling on the side; posterior sidc much roundccl; umboncs placed lowards thc posterior sidc, rathcr largc, clcrntccl, ami slightly lurncd to onc siclc ; wholc surface covcrcd with nnmcrous, vcry sharp, clcrntcd, conccnt ric, somcwhat wa\'(\d, laminar stri,c, !he int ersticcs thickly coYerccl with dccussatccl, cxtrcmcly minute, longitnclinal ancl tnrns,·crsc umlulating stri.c; hingc with two primary lc<'lh, ancl a lateral onc in each val\'c; in thc lcft ,·ah·e a largc, broad, biftd, rc- llec-tecl, clcrnlcd tooth, which bcnds ontwanl~, pointing to thc umbo, two-thirds of which is clcrntccl abo,·e thc margin of thc shcll; thc othcr tooth is thin, ami s111all , running ohliqucly alongsiclc thc lateral tooth, which riscs ncar the nmbo, ami obliques l owards thc anterior si<lc, and is most elcrntecl al its tcrmination; ovcr this loc,th is placed thc liga111cnt; in !he right \'alvc the tccth are similar to thosc of the oppusile n,h·c, thc