SCALARIA. 77 



Perhaps a small variety of the preceding species, from which it 

 differs in the produced terminations of the ribs. 



S. UNCINATICOSTA, d'Orb. PL 16, fig. 95. 



Whorls about 6, whitish or yellowish, with distinct, regular spiral 

 lirse, with 12 strong, thick equal lamellae, aculeate above. 



Length, 7 mill. 



West Indies. 

 S. CANDEANA, d'Orb. PL 16, fig. 96. 



Whitish, shining, whorls 6, rapidly enlarging, convex, with close 

 spiral lirse, and 12-16 simple ribs. Length, 6-9 mill. 



West Indies* 



S. aeuta, Pfr, is a synonym. 

 S. CRENATA, Linn. PL 16, figs, 15, 97, 98. 



Thick, white, closely spirally striated, with about 12 rather close,, 

 low spiral ribs, usually becoming obsolete on the middle of the last 

 whorl and produced above into sutural crenulations. 



Length, 15-17 mill. 



Southern Europe ; Canary Is ; W. Indies. 



It is S. raricostata, Costa. 



Var. S. CRENULATA, Kiener. Fig. 97. 



The West Indian specimens are wider than those of the 

 Mediterranean and Morch considered them a distinct species, they 

 are so close, however, in other respects, and particularly in the 

 peculiar appressed sutural crenulations of the ribs, that I hesitate 

 to give them a separate position. 

 Var HOTESSIERIANA, d'Orb. fig. 98. 



A very narrow form, differing considerably from the usual West 

 Indian type, as above, being as much narrower than S. crenata as 

 the former is wider. Length, 11 "5 mill. 



West Indies. 



S. crassicosta, Gray Ms. and of C. B. Adams are both referred 

 here by Morch ; the former, which is figured by Sowerby from a 

 specimen without locality in the British museum (fig. 15) appears 

 more like the typical S. crenata. On account of the fossil S. 

 crassicostata Desh. Nyst changed Gray's name to S. grossicostata. 

 Morch adds S. conifer 'a, Mtg. 



Var. CRENATOIDES, Carp. PL 16, fig. 1. 



Stout, like Var. crenulata, but shorter. Length, 13 mill. 



Cape St. Lucas, S. Diego, Cal. 



