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

CLASS TH IRD. CIRRIPEDA. Thc animals are soft, destitutc of a head, and consequently of eyes; covercd with a shell, and are incapablc of locomotion, being always affixcd to cxtraaeous bodic~. T hc whole of thc Cirripedes are mult1valvc; that is, cousist- ing of more than two pieces, or valves. ORDER L-PEDUNCULATA. Body supported on a tubular, membranaceous, movcable ~c- <luncle, the base of which is affixe<l to stoncs and othcr marine bodies, or timbcr floating in thc occan. GENUS 1-ÜTION,-Lcach. Body of thc animal subquadrate, placed on a fleshy pedunclc, with :m ovatc, wi<lc apcrturc, for thc passage of thc ciliated ten- tacula, surmounted by two auriform processes ; shell concealed, and composcd of five widcly separatcd, bielden valves; two scmilunate oncs situatc al thc lowcr sides of the apcrture, two vcry small terminal, two very small oncs placed on each side of a small fissurc at the top of the aperture, and a dorsal very minuto 011c. l. ÜTION IlLAINVILLII, pi. LI, f. 13, 1'1, 15. Otio1~ Blainvillii, First Ed., pi. 5, f. 13, 14, 15. Va1·iet9 1, f. 18. Otion Blaillvillii, Lcach, Ency. Brit. Sup., Art. Cirripedes, pi. 57, f. 3 ; Lamarck, V, p. 51 O; Lepas Blainvillii, Brown, Ency. Drit., VI, p. 404; lb., Conch. Tcxt Book, p. 148, pi. 19, f. l. Ventricose, mcmbrnnaceous, seatcd on a tubc, and sur- mountcd by two auriform nppcndages; colour whitish, spotted and strcnkcd with brownish-purplc. Found nlive on n piecc of rotten wood, on the south coast of Dcvon. Vai·icty 2 1 f. 1-1, 15. Lepas conmta, l\fontagu, Linn. Trans., XI, p. l 79, pi. 12, f. l. Found afüe on thc bottom of n transport, strandcd on thc Dcvonshirc const . It is vcry doubtful whcthcr shclls of this genus have cver hrcd in thc British seas. GENUS 2.-CINEnAs.-Lcach. Animal _with n quadratc body, scatcd on a flcshy pcdunclc, co1·cred w1th n membranaceous epidermis; an aperture in front for the passage of the ciliatcd tentacula; immecliately ovcr this are a pair of small clongatcd valvcs, placed nearly horizontal. two tr_iparlitc vah-es situate just below thc aperturc, one 0 ~ ~ach s1de, :md placed ncarly pcrpendicularly, and an angulated, keel-shaped, dorsal valve, but these do not cover the body. l. C1NERAS VlTTATA, pi. LVI, f. 16, 18. Oinc,·as vittata, va,·. a, First Ed., pi. 5, f. l 6, 18 ; Leach, Ency. Dril. Sup,, pi. 57, f. l; Lamarck, V, p. 408; L epas vit- tata, Drown, Ency. Drit., VI, p. 404; L epas membmnacea, Montagu, Sup., p. l 64; lb., Lino, Trans., XI, p. 182, pi. 12, f. 2. Membranaceous, ventricose, truncated, and angular al the summit; olive-green wilh black stripes, and fine, minute, nar- row, distant valves. Vm·iety b, f. 1 7, Found on the coast of '\-Vales, and has been met with on the Forfarshire coast, near Montrose. 2. CINERAS AURITA, pi. LI, f. 19, Oineras atwita, First Ed., pi. 1, f. 19; L epas au,·ita, Brown, Ency. Brit., VI, p. 404. Peduncle and whole externa! membranc greenish ash-colour- cd, with three longitudinal lines of black; two short, roundcd, auriform, blunted processcs behind. Differs from thc preceding species in being devoid of white markings, and probably only a variety of that shell. Found at Plymout.h. GENUS 3.-PoLLlCIPES,-Leach. Bo<ly co1•cred by a shell, and supported by a tubular, tcndi- nous, squamifcrous peduncle, which seldom exceeds two inches in length; shell multivalve, comprcssed on the sidcs, with the valves nearly contiguous ancl unequal; valves thirtecn or more in number, those on the sides smallest ; fi ve upper valves much larger than thc others; thc anterior pair conical, elongated, with their sides reflected backwards, situate on each side of the opening; the central, or terminal pair largcst, and trapcziform, with an acule angle al the posterior cxlremity; dorsal vah•e grcatly elongalecl, broad al the base, rounded in the back, with an acute apex; betwcen these, in thc pcdunclc, are a number of smaller, testaceous, generally triangular studs. 1. PoLL1c1rEs conNucor1A, pi. LI, f. 11, 12. Pollicipcs co1·nucopici, va,•, a, First Ed., pi. 5, f. 11, 12 ; Lamarck, V, p. 406; Leach, Ency. Brit. Sup., Cirripcdes, pi. 57; Brown, Ency. Brit., VI, p. •103 ; L epas P olliccpcs, l\fon- tagu, Sup., p. 6, pi. 28, f. 5. ?nlves_ 811100th and glossy; pcduncle slightly comprc,secl, variable m length, ami col'ercd with numerous, s111all, glossy, brown, shagreen-like scales, arran.-.cd in nn imbricnted mnnner, ancl entirely co1•ering thc membra~accous skin. Vm·iety b, f. 12. Found on drifted wood, in the Frith of Forth, ami al,o (HI thc Irish coast.