174 CERITHIOPSIS. 



V 



Section Seila, A. Ad., 1861. 



C. TEREBRALE, C. B. Ad. PI. 36, figs. 56, 58. 



Whorls 10, flattened, with three sharp, elevated spiral ridges on 

 each, the intermediate channels showing microscopic longitudinal 

 strise, base short, smooth, bounded by a ridge ; chocolate brown. 



Length, 7"5 mill. 



Massachusetts to West Indies. 



The synonyms are C. terebellum, C. B. Ad., C. interruptum 

 (Menke) Krebs, C. trilineatum, Phil, (fig, 58). 



C, AssiMiLATA, C, B. Ad. PI. 36, fig. 59. 



Chocolate color, three revolving sharp ribs on the spire whorls, 

 with additional ones on the periphery and base of the body whorl 

 — the last minute ; whorls 16-18, flattened, suture very indistinct. 



Length, 6-10 mill. 



Panama to Mazatlan. 



C, CARiNATA, E. A. Smith. PL 36, fig. 60. 



Whorls 15, the first three smooth, convex, with three narrow 

 spiral cariuEB, the interstices longitudinally closely striated. 



Length, 6 mill. 



Whydah, W. Coast of Africa. 



C. BACiLLUM, Issel. PI. 36, fig. 63. 



Whorls 10-11, convex, with deep suture, whitish, with four spiral 

 cords, and close longitudinal stripe in the interstices, base smooth. 



Length, 3 mill. 



JRed Sea. 



C. Kanoni, Folin. PI. 36, fig. 62. 



Whitish, shining, maculated with longitudinal chestnut veins; 

 whorls 11, flat, each with three rounded spiral ribs, between them 

 widely longitudinally striated, base smooth, short, concave, defined 

 by a slight ridge. Length, 5 mill. 



Bay of Panama. 



C. MoRELETi, Folin. PI. 36, fig, 61. 



Chestnut brown, yellowish white towards the apex ; whorls 11, 

 flat with three revolving narrow ridges, the somewhat wider inter- 

 spaces distantly longitudinally lirate, as though beaded, base smooth, 

 defined by a thread. Length, 8 mill. 



Bay of Panama. 



