CREPIDU LA. 



Plate IV. 



Species 19. (Mus. Cuming.) 



Chei'idula Aplysioides. Crep. testa ovatd, subconcmd, 

 'ipice nubroslrald, riifescente-corned, obscure/usco-radi- 

 (itd ; appendice internd subprofttndd, opali-albd. 



The ArLYsiA-LiKE Chepidula. Shell ovate, rather 

 concave, slightly beaked at the apex, reddish-horny, 

 obscurely brown-rayed ; internal appendage rather 

 deep, opal-white. 



Hub. Rio Janeiro ; Macgillivray. 



A reddish-horny species, looking on the outside curi- 

 nusly like an Jphisia. 



Species 20. (Fig. a, b, Mus. Cuming.) 



Crepidui.a incukva. Crep. testa oblongo-ovata, iortit- 

 t»so-compressd, apice aduncd, radiaiim striata, purpu- 

 reo vel nigricante lentigbwsd ; appendice internd opali- 

 albd. 



The incuryeb Crepiuula. Shell oblong-ovate, tortu- 

 ously compressed, hooked at the apex, radiately stri- 

 ated, freckled with purple or blackish ; internal ap- 

 pendage opal-while. 



Bkouerip, Pro. Zool. Soc. 1834, p. 40. 



Hab. St. Elena and Xipixapi, West Columbia (found on 

 dead shells, dredged from sandy mud, at a depth rang- 

 ing from six to ten fathoms); Cuming. 

 The tortuous compression of this shell is the same in 



ail individuals of the species. 



Species 31. (Fig. a, b, Mus. Cuming.) 



Crepidula costata. Crep. testa ovatd, radiatim cos- 

 laid, costis distantibus,fexuosis,muricato-tuberculatis, 

 iuterstitiis striatis ; fuscesceiile-albd, versus marginem 

 pnrpureo tincid et lineatd, margine Jlexuoso ; appen- 

 dice internd subampld, opali-albd, concavd. 



The ribbed Crepidula. Shell ovate, radiately ribbed, 

 ribs distant, flexuous, prickly-tubercled, interstices 

 striated ; brownish-white, stained and lineated towards 

 the margin with purple, margin flexuous ; internal 

 appendage rather large, opal-white, concave. 



Deshayes, Anim. sans vert. vol. vii. p. G44. 



Hab. New Zealand. 



A fine tubercularly ribbed species, stained and lineated 

 towards the margin with purple, which is seen through the 

 opal-white lining of the interior. 



Species 22. (Fig. a, 6, c, d, Mus. Cuming.) 

 Crepidula accleata. Crep. testa ovatd, Haliotidifor- 

 mi, apice lateraliter incurvd, radiatim dense miiricato- 

 squamatd, fusco aut purpurea et alba radiatd ; appen- 

 dice internd diaphano-albd, concariusctild, iii medio el 

 ad latus siibemarginatd. 

 The prickly Crepidula. Shell ovate, Haliotis-shaped, 

 laterally incurved at the apex, radiately densely prickly- 

 scaled, rayed with brown or purple and white ; inter- 

 nal appendage diaphanous -white, rather concave, 

 slightly notched in the middle and at the side. 

 ralella acu'teata, Gmelin, Syst. Nat. p. 3693. 

 Crepidula acnleata, Lamarck. 

 Crepidula hi/strix, Broderip. 

 Crepidula echinus, Broderip. 

 Crepidula Cali/ornica, Nuttall. 

 Hab. Lobos Islands, Peru ; Cuming. California; Nuttall, 

 Carpenter. Honduras ; Dyson. Sandwich Islands. 

 Australia. Kurrachee, mouth of the Indus. 

 As Mr. Broderip truly predicted, when describing his 

 C. hjstrix and echinus, these are both varieties of one and 

 the same species, the Patella aculeaia of Gmelin. Having 

 a widespread geographical range, the specimens vary ac- 

 cording to locality. The finest are those from Peru, 

 figured in the accompanying Plate, richly purple-coloured, 

 with the scales frequently produced into erect, tubular 

 spines. From California and the Sandwich Islands the 

 species is smaller, and mostly of a rust-brown colour. 



Species 23. (Mus. Cuming.) 

 Crepidula hepatica. Crep. testd ovatd, subprofunde 

 convexd, lavigald, apice oblique rostrato, marginali, in- 

 tense castaned, ad apicem minute albiradiatd ; appen- 

 dice internd ampliter septiformi, concavd, opali-albd. 

 The liver Crepidula. Shell ovate, rather deeply con- 

 vex, smooth, with the apex obliquely beaked and 

 marginal, dark-chesnut, minutely white-rayed at the 

 apex; internal appendage largely septum-shaped, 

 concave, opal-white. 

 Deshayes, Enc. Meth. Vers, vol. ii. p. 20. 

 Hinds, Moll. Voy. Sulphur, p. .53. 



Eab. ? 



This species differs from C. adunca in having the apex 

 not produced into a hook, while there is a marked diffe- 

 rence in the septum, which is mucii larger, covering quite 

 one-half of the interior of the shell. 



lune, 1859. 



