CRUCIBULUM. 



Plate III. 



Fig. 7 «, h. (Mus. Cuming.) 

 This shell appears to be a specimen of C. lenue, in finer 

 condition than the Broderipian type figured in Plate I. 

 The vertex being free from any decortication is, though cen- 

 tral, twisted obliquely, and sharply hooked, and tlie shell 

 is more strongly sculptured with close-set, ridge-like strice. 



Species 8. (Fig. 8 «, 8 A, 9 a., 9 4, Mus. Cuming.) 



Crucibulum courugatom. Cruc. testa orbiculari vel 

 ovatd, elevato-convexd, vertice lateraliter compresso, 

 radiatim costatd, costis pecuUanter Jlexuoso-rugatis, 

 albidu aut livido-fmcd; appendice interim mnpla, 

 eburned. 



The wrinkled Crucibulum. Shell orbicular or ovate, 

 elevately convex, top laterally compressed, radiately 

 ribbed, ribs peculiarly flexuously wrinkled, white or 

 livid-brown ; internal ai)pendage large, ivory-white. 



Carpenter, Pro. Zool. Soc. 1856, p. 204. 



Hab. California. 



There is a strong peculiarity in the ribs of this species. 



They have a flexuously wrinkled shrivelled appearance, and 



a new lib commences about halfway down in the inter- 

 stices between those that spring from the top. 



Species 9. (Fig. 8 p, 8 rf, 9 e, 9 rt', Mus. Cuming.) 



Crucibulum imbricatum. OriK. testa orbiculari vel 

 ovatd, subelevato-convexd, oblique radiatim costatd, 

 costis fortibus, subjlcxuosis, vertice acuto, lateraliter 

 compresso, albidd, fusco-rubente interdum strigatd ; 

 appendice interna cyatkiformi, atnpld. 



The imbricated Crucibulum. Shell orbicular or 

 ovate, rather elevately convex, obliquely radiately 

 ribbed, ribs strong, rather flexuous, top sharp, late- 

 rally compressed, whitish, sometimes streaked with 

 brown-red ; internal appendage cup-shaped, large. 



Calyptrma imbricata, Broderip, Trans. Zool. Soc. vol. i. 

 p. 198. pi. 37. f. 7. 



Hob. Panama (on stones in sandy mud at a depth of from 

 six to ten fathoms) ; Cuming. 



The ribs are much more strongly developed than in the 

 preceding species, and have an oblique inclination over 

 the margin. 



December, 18.58. 



