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

(jQ MOLLUSCA. [GASTEROPODA A varicty is somctimcs found, particularly in a strcam ncar Folkstone, in Kent, fincly striated longitu<linally. Montagu s:iys this varicty is so strongly striatc<l, that it was by some c-onsidered a distinct spccies. He a<lds, "1 hcse werc of an inferior sizc, and covere<l with a dusky epidermis, differing in nothing but thc striro bcing more conspicuous." Common in most rivcrs and streams in Grcat Britain and T reland, adhcring to stoncs at the bottom. Scction II~Animals dc:i:tral. 2. ANcY1,us LACUsT111s, pi. XII, f. 3, 5, and 7~First Ed., pi. 36, f. 3, 5, ami 7. Anc!Jlus lacust,•i.,, Miillcr, Vcrm., II, p. 199; Drapcrnaucl, p. 47, pi. 2, f. 25, 26, 27; Pfcill'er, p.109, pi. 4, f. 46; Lamarck, VI, pt. 2nd, p. 27; Flcming, Ilrit. An., p. 280; Alder, Mag. Zool.and Bot., II, p.116; Turton, Man., p. 1,11, pi. !O, f.126; Thompson, Ann. ancl Mag. Nat. I-Iist., VI, p. 47; Patelfo lac1tslris, Linné, Syst. Nat., p. 1260, No. 769; Pcnnant, llrit. Zoo!., IV, p. 1,12; Montagu, Test. llrit., p. 48,1; Donovan, Bri t. Sh., pi. 150; 13rown, Wcrncrian Mcm., II, p. 533; lb., Ency. Brit., VI, p. 466; Patella olilongci, Maton and Rackett, Linn. Tr., VIII, p. 233; Lightfoot, Phi!. Trans., LXXVI, p. IGS, pi. 3, f. l. Shell conical, and of a much elongated, oval form, com- prcsscd on thc sidcs, thin, smooth, but not glossy, or slightly wrinklcd, nearly mcmuranaceous, subpellucid, of a pale horn- "olour, coverecl with a yellowish-green epidermis; vertex small, acule, placecl somewhat posteriorly, a littlc reílectcd, obliquely incli11iug towards the narrower end; aperture oblong-oral; margin membranaceous; inside smooth, glossy, ami of a bluish- white. Lcugth a little more !han a quarter of an inch; breadth ahout half its length. Found in lakl'S ami still clitches, in many situations in Greal Britain alHI Ireland, adhering lo aquatic plants. \Ve may par- licularise lhc Stour, Dorsetshire; thc Thames, near \Vinclsor ; Winclcr111erc; a1Hl in a pool near the E cclcs station, on the Liverpool ami Manchcster Hailway; Duclclingston Loch, near Edinburgh; a1Hl in Ireland, I met with it in a millrace, near ~aas; Thompson givcs as localities, Potamogeton; in thc clrains nf the bog meaclows, ncar llclfa.st ; the L agan canal; in a pond al i\Ioira, County of Down; a1H] varions other situations. FAMILY IV,-CAt.n•TnAcEA. 13ranchirc of the animal situate in a dorsal cavity near thc ncck, and inclucled in thc cavity, or projecting beyond it.; shell invariauly externa!. GENus 9--CAt,YPTRiEA,-Lamarck. Shell conical; ,·erlex subcenlral, in1perforate, and acutc; base or aperturc orbicular, or ncarly so, its margins sharp and eutirc. interna! Ctl\'i ty provicled with a lateral, interna! nppenclarre, 0 :. ,~plcm, which varics much in form in differcnt spccies. 0 Sc,·e- r~\ spcci_es pr°''.idccl with a slrongly markecl nmscular impression, :;1tuatc 1mmc,hately above thc fold of lhc inner lip; in other sperics it is placed on thc oulsicle of thc inncr lip, but ne,·cr wilhin it. J. CALYPTRLllA SINENSE, pi. XX, f. 16 and IS~First Ed., pi. 37, f. 16 all(] 18. Cal!Jplrccci Sinc11sc, Lamarck, VI, pt. 2nd, p. 22; Brown, Conch. Text Book, p. 90, pi. 1,1, f. 19; Cal!Jpl1'Cea cldncnsis, Fleming, p. 362; Patclla c!tincnsis, Linné, p. 1257; i\fontagu, p. 489; Patclla Sinensis, Brown, Ency. llrit., VI, p. 464; Patclla albida, Donovan, pi. 129. Shell thin, subpcllucid, subconic, much depressecl, of a palc yellowish-brown colour, or crcam-white, rounclecl at thc margin; vertex nearly central, tcrminating in a small, concentrically subspiral tip ; externa] surfacc undulatc<l, or wrinklccl, in sorne spccimcns, and a littlc rough, with co11ca1•c scalc-like projec- tions; apcrture ncarly circulaq insicle very glossy, smooth, and whitc, in s0111e instances of a vcry pale pink colour, and pro- videcl with a subspiral internal columella, or trm1s,·ersc sub- seplcm, or columellar projection, broacl, ílat, thin, transvcrscly obliqnc, cxlending from nearly thc margins to thc centre, on one ,icle, ancl forms the externa! subvolutio11. I-Icight some- what more than half an inch; cliametcr ncarly an inch. Found at Penryn, in Cornwall; Helford Harbour; ancl on thc W cst coast of lrclancl ; but is a raro Brit ish spccics. GENUS I0.-P1LEOl'Sts~Lamarck. Shell obliquely conical, posteriorly recurvcd, with an u11ci- neate spiral apcx, thc volutions separatcd, ancl rollcd inwards; apcrturc large, ovatc; anterior margiu shortcst, the posterior onc largc and rounded; inside with elongatcd, trans,·crse, muscular imprcssions, situatcd u11der the posterior margin; external surface clothcd with a lhick, han!, somcwhat pilous epidermis. l. PILEOPSIS UNGARICA, pi. XX, f. 1~), 20.-First Ed., pi. 37, f. 19, 20. P.ilcopsis w1garica, Lamarck, VI, pt. 2nd, p. J 7; B row 11 , Conch. Text Book, p. 100, pi. 14, f. 31; Patella 1111garica, Martini, 1, pi. 12, f. 107, 1OS; Pennant, IV, p. 149, pi. 90, f. 147; Patcllct m1gm·ica, Monlagu, p. 4SG; Donovan, I, pi. 21, f. 1; Brown, Ency. l3rit., 6th Ed., VI, p. 4G5; lb., \Vcrncrian Mem., II, p. 533 ; Capulus lm11ga1·ic-us, Fleming, p. 363 ; Forbes, p. 33. Shcll subconic, with a greatly rcllcclecl verlcx, tcrminatincr i11 a spiral wrcath unclerncath, consistinrr of t wo or threc s~ 1 all . . o vo~u_tions, wh1_ch _are not inclincd to eirher side, except thc ap1c1al one; 1t 1s a s ubpcllucicl, rathcr thin shell, stronrrh· slriatecl longitudinally, with strong conccnlric wrinklcs, of :~ yellowish-whitc, or llesh-colour, and covcrcd externally with a yellowish-brown, rough, pi lous, vclvct-like epidermis; ; pcrture ncar!y orbicular, wi1~1 an oblique, intcrnally sloping lip, narrow lowanls the ,·crlex rnlc, and graclu:illy widening, on bolh sidcs, lowards the othcr extrcmity; insidc exlrcmcly smooth a1ul glossy, whi1e, sometimes of thc most hcauliful rose-colour; º' '.ler li~ m~ire or less indenterl, and crcnaled, with 1hc <,pider- m1s proJectmg beyond it, in !he form of a silicatn uorder. This species is by no means rarc 011 man·, of the co,1st<. aroun'.I Grcat Bri1ai11 a1Hl Trcland. 11 is ,·cry f;·cquently found adhering to oysters ami slones b rought from the botl 0111 u,· 1 lll' dredge. ·