146 



CERITHIUM. 



C. OBELiscus, Brug. PI. 27, figs. 39, 40. 



AVhorls with tuberculated spiral ribs and intermediate granulated 

 spiral striae, the tubercles more prominent on a slight shoulder of 

 each whorl ; yellowish white, more or less thickly sjiotted and 

 clouded with chestnut or chocolate ; last whorl with an obtuse 

 lateral varix. Length, 2-2*5 in. 



East Indies, Polynesia, Mauritius. 



It is C. Sinensis, Gmel. A smaller form, in which the sculpture 

 is sharper has received the name of C. cedo-mdli, Sowb. (fig. 40). 

 C. coRDiGERUM, Bayle. PI. 27, fig. 41. 



Shell finely, closely, spirally striated, with a line of tubercles at 

 the suture, and a second, less prominent series below it on the spire, 

 two or three inferior distant riblets on the body-whorl ; whitish or 

 yellowish brown, the riblets of the body-whorl often articulated 

 with chestnut. Length, 1*5 in. 



Australia. 



Notwithstanding the difference in the sculpture I suspect that 

 this Avill prove to be a mere variety of C. obeliscus. It was described 

 I)y Lamarck as C. semigranosum, but as that author previously used 

 the same name for a different, fossil species, Bayle changed it as 

 above. 



•C. PULCHER, A. Ad. PI. 27, fig. 42. 



Spirally striated, obsoletely longitudinally ribbed, with a row of 

 nodules at the suture, and a varix on the last whorl ; yellowish, with 

 chocolate spots between the sutural nodules. Length, 2 in. 



N. Australia. 

 C. GEMMATUM, Hiuds. PL 28, figs. 44, 45 ; PL 27, fig. 43. 



Spirally grooved, the interstices more or less tuberculated, a 

 stronger band of tubercles next the suture, body whorl flattened in 

 front, with a large lateral varix ; yellowish white, marbled and 

 sjDotted with chestnut or chocolate. Length, l'5-2 in. 

 Mazatlan to Panama ; Viti Islands; Australia; Indian Archipelago. 



The West American localities are for the type, the others for C. 

 articidatum, Ads. and Reeve (fig. 45), which I cannot sej^arate even 

 as a variety; C. tenuiscxdptum, Sowb. (fig. 43), is another synonym. 

 C. SEMiNUDUM, Sowb. PL 28, fig, 46. 



White, spirally grooved, whorls angulated above the middle, 

 armed with three series of large, sharp tubercles, body-whorl with- 

 out tubercles below. Length, 1*25 in. 



Neto Caledonia. 



