CREPIDULA. 



Plate V. 



Species 21. (Mus. Cuming.) 



Ckepidula kostrata. Crep. testa ovatd, apice producto, 

 rostralo, fuscescente, subpellucidd, interdum nigro- 

 punctatd ; appendice interna parva, diaphano-albd, 

 subimmersd. 



The beaked Crepidula. Shell ovate, apex produced, 

 beaked, brownish, subtransparent, sometimes black- 

 dotted ; internal appendage small, diaphanous-white, 

 rather immersed. 



C. B. Adams, Panama Shells, p. 235. 



Hab. Panama. 

 Though of the same typical form as 0. adunca, this 



appears to be a distinct species. 



Species 2.5. (Fig. a, b, Mus. Cuming.) 



Crepidula convesa. Crep. testd ovatd, icnuiculd, con- 

 vexd, mbcompressd, apice oblique rostrato, marginali, 

 pallide fuscescente ; appendice interna parviusadd, 

 subimmersd. 



The convex Crepidula. Shell ovate, rather thin, con- 

 vex, somewhat compressed, apex obliquely beaked, 

 marginal, pale-brown ; internal appendage rather 

 small, a little immersed. 



Say, Journ. Acad. Nat. Sci. Philadelphia, vol. ii. p. 227. 



Hab. ? 



A slightly compressed convex shell, of light transparent 



substance. 



Species 36. (Mus. Cuming.) 



Crepidula pallida. Crep. testd ovatd, subdilatatd, 



apice oblique incurvd, sordide albd; appendice inlernd 



in medio productd. 

 The pale Crepidula. Shell ovate, somewhat dilated, 



obliquely incurved at the apex, dead-white ; internal 



appendage produced in the middle. 

 Kroderip, Trans. Zool. Soc. vol. i. p. 204. pi. 29. f. 3. 

 Hab. Falkland Islands. 



This is not a satisfactory species, and will, doubtless, 

 prove to be a variety of C. dilatala. 



Fig. 27. (Mus. Cuming.) 



The shell here figured is a specimen of C. acukatus, 

 from the mouth of the Indus, at Kurrachee. 



Species 28. (JIus. Cuming.) 



Crepidula exuviata. Crep. testd eloMjaio-producld, 

 augustd,curvatd, sordide albd ; appendice internd con- 

 ve.m, diaphano-albd. 



TuK cast-skin Crepidula. Shell elongately produced, 

 narrow, curved, dead-white ; internal appendage con- 

 vex, diaphanous-white. 



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



Hab. Monterey, Upper California. 



Of a singularly produced growth, narrowly drawn in at 



the sides, with the diaphanous septum convexly raised 



in the middle. 



Species 29. (Fig. a, b, Mus. Cuming.) 



Crepidula bilobata.. Crep. testd oblique orbiculari, 

 apice subrostrattt, tenui, subpellucido-albd, rufescente 

 radio td appendice internd parviusculd, concavd, medio 

 productd. 



The two-lobed Crepidula. Shell obliquely orbicular, 

 slightly beaked at the apex, thin, subtransparent- 

 white, rayed with pale-red ; internal appendage rather 

 small, concave, produced in the middle. 



Gray, MS. Mus. Cuming. 



Hab. ? 



A thin obliquely-grown species, with a septum similar 



to that of C. dilatata. 



Species 30. (Mus. Cuming.) 



Crepidula lirata. Crep. testd ovatd, subcompressa, 

 radiatim corrugato-liratd, apice marginali, subros- 

 trato ; livido-castaned, versus apicem rubente ; appen- 

 dice internd diaphano-albd, subconcavd. 

 The ridged Crepidula. Shell ovate, rather com- 

 pressed, radiately wrinkle-ridged, apex marginal, 

 slightly beaked ; livid-chestnut, red towards the apex ; 

 internal appendage diaphanous-white, rather concave. 

 Hab. California. 



The outer surface of this species, of which I have seen 

 several examples, is characterized by a sculpture of irre- 

 gular waved radiating ridges, which do not appear to re- 

 sult from having grown upon a ribbed shell. The region 

 of the apex in all the specimens is also peculiar in being 

 of a livid-reddish colour. 



June, 1859. 



