﻿NEW CRETACEOUS FOSSILS. 333 



VOLUTILITHES, Swahison. 



Volutilithes cretacea. PI. 35, fig. 16. Fusiform ; spire elevated ; volutions con- 

 tracted beneath the suture,- irregular longitudinal ribs on the upper volutions. 



Length of fragment 2i inches. 



Another less perfect specimen has been a much larger shell. This species bears 

 some resemblance to Voluta Lamberti, of the British Miocene. A young specimen 

 which is figured in outline has a very acute spire and minute revolving lines. The 

 columella being imperfect, the plaits have not been observed. The base is narrow, 

 produced and but slightly emarginate. 



CHEMNITZIA, UOrUgny. 



1. Chemnttzia interrupta. PL 35, fig. 15. Spire prominent, scalariform, pro- 

 foundly costate longitudinally ; ribs interrupted below the suture by a deep furrow ; 

 base with rather distant, revolving lines- 

 Col umella and base imperfect; therefore this and the following shell are only pro- 

 visionally referred to Chemnitzia. 



2. Chemnitzia distans. PL 35, fig. 30. Short — subfusiform; spire prominent, 

 subscalariform ; volutions four, reticulated ; body volution with longitudinal, distant 

 ribs intersected by distant, prominent, revolving lines ; columella profoundly curved 

 near the middle. 



TRICHOTROPIS, Sowerby. 

 Trichotropis cancellaria. PL 35, fig. 8. Acutely subovate ; volutions five ; spire 

 subscalariform ; body whorl ventricose ; longitudinal ribs narrow, prominent, distant ; 

 revolving lines prominent, distant, with an occasional minute intermediate line; 

 columella profoundly incurved ; labium reflected ; base subumbilicated ; shoulder of 

 body volution with minute revolving lines, and one larger than the others. 



TURRITELLA, Lam. 



1. Turritella tippana. PL 35, fig. 19. Subulate ; sides straight ; volutions carinated 

 with revolving lines, two on each volution larger than the others, remote, one nearly 

 equal in size, nearly medial, and three other fine lines ; whorls of spire slightly cari- 

 nated at base. 



2. Turritella altilis. Broad at the base, rapidly narrowing, apex very acute ; 

 volutions about eighteen, sides straight, costge four, in pairs, two upper pair more 

 approximate, and smaller than the inferior pair ; three on the lower part of body 

 volution ; shell marked with minute revolving lines, the central one between the costce 

 largest. 



Length 3 inches ; width of body volution 1 inch. 



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