108 



apex yerj acute; spire with the outlines quite curvilinear: 

 whorls about 14, planulate, with the place of the suture 

 distinguished bv a somewhat larger groove, last whorl 

 abruptly terminating : canal short, alightly turning to 

 the riglit." Ad. 



Long. 0,225 poll. ; lat. O.q, poll. 



Cerithium modestum Ad. Contr. p. 117. 



Cerithium pusillum Pfr. Arch. f. N. g. 1840. p. 

 256. Nr. 138. (non Gm.) 

 Hab. Jamaica (Ad.) St. Thomas (Riise.) 



258. Triphoris melanura C. B. Ad. 



„Sh. like modestum , but siiow white except the 

 dark bro^^^l apex, much morc slender, Avith the outlines 

 less curvilinear, and the aperture smaller." Ad. 



Long. 0,2 poll. : lat. O.^^j poll. 



Cerithium melanura C. B. Ad. Contr. p. 117. 

 Hab. Jamaica (C. B. Ad.) Antill. (Krebs.) 



259. Triphoris intermedius C. B. Ad. 



„Sh. conoid, turrited, sinistrorsal: reddish black or 

 dark brown, with a broad white Spiral band on the 

 loAver part of the whorls; white near the apex: with on 

 the Upper whorls, two, and on the loAver Avhorls, three 

 nodulous Spiral ridges, and anteriorly three additional 

 less strongly nodulous spiral ridges: apex acute: spire 

 with the outlines rectilinear above, moderately curvilinear 

 below: whorls about 12, planulate, Avith the place of the 

 suture distinguished by a rather deeper groove: last 

 whorl terminating rather abruptly: aperture rather small, 

 obliquely obcordate: canal short, nearly closed at the 

 origin; much deflected obliquely backwards. This spe- 

 cies is intermediate between C. ornatum Desh. and C. 

 modestum." Ad. 



Long. 0,2 poll.; lat. O,^, poll. (Ad.) 



Cerithium turris Thomas Chemn. d'Orb. Cuba. 2. p. 

 155. Nr. 341. t. 23. f. 10—12. 



