132 CERITHIUM. 



C. serratum, Wood, C. mitrceforme, SoAvb, (figs. 5, 6), which 

 varies in having a white sutural band, C. eximium, Sowb. (figs. 7, 

 8), C. granosum, Kiener (fig. 9), and C. sordidulum, Gould (fig. 15), 

 are synonyms. 



C. TENELLUM, Sowb. PI. 23, figS. 10, 11. 



Thin, nearly transparent, wdiite or rose color, sometimes with rows 

 of small chestnut spots, varices white, whorls with excavated shoulder, 

 tuberculated more strongly at the suture and shoulder angle than 

 elsewhere, canal short and open, outer lip single. Length, 21 mill. 



Philippines. 

 C. MuscARUM, Say. PL 23, figs. 12, 13. 



Whorls convex, crossed by rounded ribs, with wider interspaces, 

 spirally lirate, forming granules on the ribs, fine striae between the 

 lirse ; wdiitish, chestnut colored or chocolate, with series of minute 

 chestnut punctations, sometimes on the ribs, sometimes between 

 them. Length, 20 mill. 



Florida; Bahamas. 



It is C notatum, Menke. 



C. ocELLATUM, Brug. PI. 24, fig. 19. 



Blackish, spirally punctate with white, under a thin, olivaceous 

 epidermis, whorls slojjingly concavely shouldered, with a single row 

 of tubercles at the angle. Length, 1*5 in. 



Gallapagos Is. to Mazatlan, Muscat, Madagascar. 



The Pacific and West American localities furnish this shell nu- 

 merously, but specimens are in the British Museum, from Madagas- 

 car, and in the Phila. Academy are others from Muscat, collected 

 by Dr. Ruschenberger, U. S. N. C. irroratum, Gould, and C. 

 stercus-mvscarum, Val., are synonyms. 



C. iNFLATUM, Quoy. PI. 23, figs. 16-18 ; PI. 24, fig. 23. 



Chocolate color, under a yellowish olivaceous epidermis, usually 

 shouldered, varicose, and roughly longitudinally plicate, tubercu- 

 lated by the intersection of spiral riblets, with intervening spiral 

 engraved lines. Length, 22 mill. 



Philip2nnes. 



C. BUleheusti, Petit (fig. 18), is probably, and C hrevicidum, 

 Sowb. (fig. 18), is almost certainly a synonym ; C. Metcalfei, Sowb. 

 (fig. 23), can be added to the list. 



