4 8 



Buixetin 35 



196 



Page 169 



upper miocene fauna of Trinidad would have been much 

 more limited than it is. 

 Caroni beds, Savdnetta. 



Chemnitzia iurris d'Orb. Moll, de Cuba, pi. xvi. f. 10-24. 

 Other forms of this species are distinguished specifically by 

 d'Orbigny as C. pulchella, C. ornata, and C. modesta. 



These and other varieties are common in the Matura 

 Beds. 



Adz's lielederoides, n. sp. 

 Shell turreted, cylindric, many-whorled, shining, whorls 

 slowly increasing, impressed with a deep groove below the 

 suture, which is equally deep, forming a spiral thread ; 

 aperture sub-circular, columella slightly reflexed, peristome 

 simple. 



Pliocene, Matura. It resembles a Proto, but the colum- 

 ella prevents its reference to that genus. I will not be sure, 

 however, that it ought not to be placed in the neighborhood 

 of Turritella. Its smooth texture seems to be against that 

 view of its affinities. I refer it to the genus Adis provi- 

 visionally only. 



Leiostraca davata n. sp. 

 vShell rather club-shaped, whorls smooth, flattened, the 

 last forming more than x /z ; spire acuminate, suture linear, 

 scarcely impressed ; aperture suboval, elongate, narrow 

 above, dilated in front ; peristome simple, columella some 

 what reflected and thickened. 



Pliocene, Matura. Allied to L. acida. 



Turritella planigyrata n. sp. 

 Conic-cylindric, striate by fine spiral lines, whorls very 

 slightly convex, the later ones nearly flat ; aperture sub- 

 quadrate. 



