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

Íl\\'ul.UTE,] MOLLUSCA. 23 GENUS 28,-1-IALIOTIS.-Linnrous. Shcll car-shapcd, orntc, oblong, or ncarly round, allll dcprcs- ,ct!; with a vcry short, ílaltcncd, somcwhat lateral ~pire; apcr- turc cxtrcmcly largc, ncarly cmbracing thc wholc shcll, mostly cnlirc, a1al of a11 orate, or oblong form in thc adult sial.e; disk hal'ing a ~crics of circular, or ovale, perforations running paral- lcl to thc r.oltnnc\lar or lcft margin, which commcnccs with a notch; columcllar lip usually flatlene<l, or hollow, in front; somclimcs with a strongly developecl central impression; insi<le always pearlaceous, exhibiting brilliant iriclesccnt rclleclions. l. ll. tubc1·culata, pi. XII, f. 2 allll 18.-First Ed., pi. 36, f. 2 and IS ; Ilccliotis iubc1·cufata, Pcnnant, Brit. Zoo!., IV, p. 1-11, pi. 88, f. lH; Donovan, Brit. Sh., I, pi. 5; Montagu, p. 473; Fleming, Brit. An., p. 362; Turton, Brit. Fauna., p. 196; Brown, \Vcrnerian Mcmoirs, II, p. 532; Lamarck, VI, pt. 2nd, p. 215. Shcll ovale oblong, ílat, with coarse, slightly waved, longitu- dinal strirc, ancl strong transvcrse wrinkles, all(I exlremely closc, irregular strirc; near thc inner margin is a produced ridge, cxlcnding fron1 thc base to thc first turn of thc spirc, ancl bese! with irrcgularly formecl tubercles, decrcasing in sizc as they approach thc apex ; behind this the margin is rotmclecl, ami turns inwarcl ; above this is another riclge, in whieh there is a series of largc tubcrcles, which also decrease towards thc apex; six or eight of ,thc lower ones bcing perforat.ed with ovale boles; thc upper t.ubcrcles imperforate, ami ílattcnecl al top; aperture very \\'iclc ami cmtirely open, concave, transversely crossed by shallow, broacl furrows, ami highly pearlaceous, exhibiting beau- tiful iriclescent rcflections; outer margin thin; columcllar lip bromlly reílccted, fonning a ílattened rim rouncl thc left side of the disk, nacred like the rest of the interior, and encling about an inch from thc base. Length varying from lhrce to four inchcs. Dcad shells have bcen found on the coasts of Sussex, Dor- setshirc, all(I Dcvonshirc. It is fouml abunclantly aclhcring to rock$, near low water mark, in Guernsey. :Mr. Templcton, of Bclfast, procurecl one spccimen by thc clrcclge at Springfielcl, connly of Down, Irclancl, and he assured me that sc,:cral spcci- mcns hacl becn pickccl up on thesc shorcs. Gmrns 29.-SIGAllETUs.-Lamarck. Shcll suborbicular, subauriform, dcpressecl; spire submargi- nal, much llattenc<I, and ~omclimes <·omprcssccl, consisting of not more tlmn two or thrce ,•olutions; apertnre cntirc, much dilated, oblong-ovatc, its cdges disunitecl at the uppcr extremity, in consequcncc of the outcr lip cmbracing the base of thc lasl rnlution; inner lip short, spirally twistcd, in general slightly rellcctcd al its upper part, sometimes to such an extcnt as to produce a small umbilicus; within the aperturc are lwo _1m'.s- cular imprcssions, the onc in thc uppcr, aml thc other 111 1ls lowcr cxtremity. 1. S. llaliotoideus, pi. II, f. 1, 2~Firsl Ed., pi. 44, f. 1, 2; Si,,aretu.Y lwliotoideus, Lamarck, pt. 2nd, p. 208; · S . pei·- spicims, Forbcs, Mal. Mon., p, 29; Bulla lmliotoidea, Montagu, P· 21 J, pi. 7, f. 6, ancl Vignettc 2, f. 6; Brown, Ency. Ilrit.; VI, P· 43,1; Turton, Bril. Fau., p. 168. . . Shell subo,·al, C)(tremely 1hin, pelluc1cl, wl11te, glossy, ancl smooth ; ":ry slightly wrinkled longiludinally hy the lines of gr~wth; s¡mc_Ycry small and ohtuse, consisting of two ohliqucly tmsted YOlut1011s; apcrture oval, vcry Iargc, but not qnitc ex- lending to the apex; bocly very largc, ancl cxposing thc whole interior; outcr lip thin; inner lip concarc, ami slightly inílectcd. Length thrcc-quartcrs of an inch; brcaclth half an inch. Pound in Salcomb Bay ancl Torcross, Dcronshirc; Studlaucl bcach all(l \Vcymouth, Dorsctshire; Downshire coast, Irclancl; ancl in thc Frith of Forth, Scotlancl. It appcars to inhabit dcep water. 2. S.jle.i·elis, pi. II, f. 3, 4.-First Ed., pi. 44, f. 3, 4; Bulla jlc.i·ilis, Montagu, Sup., p. lGS; Laskey, Wcrncrian :Mcmoirs, I, p. 396, pi. 8, f. 6. · Shell suboval, pcllucid; rccldish horn coloured; cxtrcmcly thin, transparent, with pretty strong longitudinal wrinklcs; spirc very small, consisting of one obliquely twistecl Yolution; apcr- ture oval, cxtcnding ncarly to thc apcx; outcr lip thin; inncr lip slighlly inílcctcd. Lcnglh not quite half an inch; brcadth an cighth ancl a half. This may be clistinguishecl from the S. I/aliotoidcs hy its reclclish horn colour, in the spire haYing bnt onc Yolution, the inílcclion of the inuer lip beiug only about half the brcaclth, by the base of the apcrlurc bcing more acule, ancl in the wrinklcs being much stronger. It is quite llexible whc'll ncwly cxlraclccl from the animal. Founcl al Dunbar, by Captain Laskey. Gmrns 29,-GALEn1cu1,uM.-Ilrown. Shcll semiovatc; body exlrcmely large, destitute of a col11- mclla; spire vcry small; apcrturc Yery largc ; outer lip ami pillar lip co11ti11uous, the !alter broad ami rcflect.e<l 011 the bocly; gc- nerally coverc<l with a11 epidermis. 1. G. la:vig<ttwn, pi. XIX, f. 35 ancl .'l8.-First E,l., pi. 38, f. 35 all(l 38; llcli.dcevigata, Donovan, Brit. Sh., III, pi, 105; Montagu, p. 382 ; Turton, l3ril. Fau., p. 195 ; Vcluti,w Lcevi- gata, Flcming, Bril. An., p. 326; Forbcs, Mal. Mon., p. 29. Shcll thin, fragilc, suborbicular, flesh colourecl; with three volutions; the bocly extremely largc, ancl the spire very small, and slightly produced, placed laterally, ancl tcrmi11ati11g in n compresscd apex; thc shell wrinkle<l 1rnnsvcrscly, and stria1cd longitudinally, or spirally; covered with a thick, rough, brown epidermis, which is gcnerally elevated into regular, equidistant, mcmbra11aceo11s, spiral ridges; apcrture suborbicular, cxlrcmoly large, inside smooth, glossy, and of a purplish-brown colour; somctimcs almost white; outer lip very thin ; inner lip somc- what obliquc, and rcflectccl 011 the body; behind which thcrc is a slight groo\'e, Ordi11ary size three-quartcrs of an inch in lcngth, ancl fiye-cighths in brcadth ; but found of very superior climensions at Porlmarnock, ami othcr places on the cast coasl of Irelancl, mcasuring ncarly an inch ancl an eighth in length, ami thrcc-quarters in breadth. Found al Southampton; at Torcross ancl Snlcomb, Dcvon- shirc; Stucllancl, Dorsetshirc; Falmouth, Cornwall; Teign- mouth, Walcs; and thc Frith of Forth, Scotland. 2. G. ovalum, pi. XIX, f. 27, 28.-First Ed., pi. 38, f. 27, 28. Shcll oblong-oval, much inflated; body vcry largc; spirc con- sisting of a single, small, knob-like volution; apcrture oval,