CREPID ULA 



Species 7. (Mus. Cuming.) 



Crepidula glauca. Crep. tedd oblique ovatd, temti, 

 convexiuiculd, complanatd, alba vd glaucescenle, ma- 

 culis saturatioribus inierdiim aspersd ; appendke in- 

 terna parvd, suhprofundd. 



The glaucous Crepidula. Shell obliquely ovate, thin, 

 rather convex, smooth, white or glaucous, sometimes 

 sprinkled with dots of a darker colour ; internal ap- 

 pendage small, rather deep. 



Say, Journ. Acad. Nat. Sci. Philadelphia, vol. ii. p. 236. 



Hab. Rhode Island, United States ; Gould. 



The shell here figured from Mr. Cuming's collection, 

 without any indication of colour, is not a very satisfactory 

 representation of the species. It is not known to me in 

 its typical state. 



Species 8. (Fig. a, It, Mus. Cuming.) 



Crepidula margin alis. Crep. testd ovatd vel orbiculari, 

 convexd, interdum plana, lavigatd vel subcorrugatd, 

 Jlavido-albd, prope apicem ctEruko timid et radiatim 

 lineatd, inius intense purpureo-castaned, ad marginem 

 jlavidd et castaneo strigatd; appendice intemd dia- 

 pAano-albd. 



TuE MARGINAL Crepidula. Shell ovate or orbicular, 

 convex, sometimes flat, smooth or faintly wrinkled, 

 yellowish-white, stained and radiately lineated near 

 the apex with blue, interior deep purple-chestnut, 

 yellowish- and chestnut-streaked at the margin ; in- 

 ternal appendage diaphanous-white. 



Broderip, Trans. Zool. Soc. vo). i. p. 20.5. pi. 29. f. 9. 



Hab. Panama ; Cuming. 



Well distinguished by its rich internal colouring, upon 

 which the septum has a bluish diaphanous-white appear- 

 ance. 



Species 9. (Fig. a, 6, Mus. Cuming.) 



Crepidula onyx. Crep. testd oblongo-oeafd, crassiusculd, 

 intus extusijne fused, rufo-Uneatd, intits saturatiore, 

 lividd ; appendice subampld, pland, alba, margine me- 

 dio emargitwti). 



The onyx Crepidula. Shell oblong-ovate, rather thick, 

 brown within and without, raved with red lines, in- 



teriorly darker, livid ; appendage rather large, flat, 



white, edge notched in the middle. 

 Sowerby, Genera of Shells, Crepidula, f. 2. 



Crepidula amygdalus, Valenciennes. 



Crepidula Cerithicola, C. B. Adams. 

 Hab. Panama; Cuming and C. B. Adams. Mazatlan ; 



Carpenter. 

 This fine species may be easily recognized by its straight 

 oval form and liver-coloured chestnut interior. The sep- 

 tum is of a bright opal-white substance. 



Species 10. (Fig. a, b, Mus. Taylor.) 

 Crepidula rugosa. Crep. testd oblique ovatd, versus 

 apicem attenuald, opice sttbrostratd, extus fuscescente, 

 rufo punctata et oblique lineatd, intus intense castaned; 

 appendice opali-albd, concaviusculd, margine in medio 

 et ad latus subemarginato. 

 The rough Crepidula. Shell obliquely ovate, atte- 

 nuated towards the apex, apex slightly beaked, exte- 

 rior light-brown, dotted and obliquely lineated with 

 red, interior deep-chestnut; appendage opal- white, 

 rather concave, edge slightly notched in the middle 

 and at the side. 

 NuTTALL, Jay's Catalogue of Shells, p. 41. 

 Hab. Upper California. 



This shell appears to be uniformly distinguished from 

 C. onyx by its more obliquely beaked growth. The ribs 

 in the specimen figured are merely occasioned by its bav- 

 in'' gTown on to a ribbed shell, probably a Pecten. 



Species 11. (Fig. a, b, Mus. Cuming.) 

 Crepidula fimbkiata. Crep. testd oblique ovatd, pland, 

 apice lateraliter incurvd, concentrice striatd, versus 

 marginem conspicue laminato-Jimbriatd, extus intusque 

 pellucido-albd, ad latus livido-fusco uniradiatd ; ap- 

 pendice ad latus emarginato. 

 The frilled Crepidula. Shell obliquely ovate, flat, 

 laterally incurved at the apex, concentrically striated, 

 conspicuously laminarly frilled towards the margin, 

 transparent-white without and within, stained with a 

 livid-brown ray on one side ; appendage notched at 

 the side. 

 Hab Vancouver's Straits. 



June, 1859. 



