380 TRANSACTIONS OF THE WAGNER FREE 



Shell depressed, with a smooth nucleus of two whorls, in all with four 

 or five whorls, a distinct suture, and the usual spiral striation somewhat undu- 

 lated by the incremental lines ; periphery rounded, base flattened and even a 

 little concave between the pillar and the periphery ; aperture large, subquad- 

 rate, the pillar-lip thin, not reflected, but with a wash of callus from the body 

 laid over the upper end; umbilicus imperforate. Alt. of young shell 10; 

 diam. 16.5 mm.; max. Ion. of shell 17 mm.; max. lat. of adult 43.75; alt. 

 20 mm. 



This fine large species appears to be quite rare in the Pliocene, and is the 

 forerunner of such species as 5. maailatus of the recent fauna. 



Subgenus Eunaticina Fischer. 



Eunaticina Fischer, Man. Conchyl., p. 768, 18S5. 

 Sigatica Meyer, Cincin. Journ. Nat. Hist. 1SS6. 

 Naticina Gray, 1842, not of Guilding, 1834. 



Sigaretus (Eunaticina) Oonradii Dall. 



Narica mississippiefisis Conr., Journ. Acad. Nat. Sci. Phila., 2d Ser. i. p. 113, pi. 11, fig. 8, 

 1848. 



Vicksburg Eocene of Mississippi. 



The shell figured under the name of Narica by Conrad is a well-defined 

 Eunaticina, and since there is already a Sigaretiis viississippiensis of the same 

 author, I propose for this one the name of Conradii. 



Sigaretus (Eunaticina) carolinensis Dall. 

 Etmaticina carolinensis Dall, Rep. Blake Gastr., p. 297, 1889. 



Pliocene of the Caloosahatchie beds, Florida, Dall ; and living off the 

 coast of North Carolina in 63 to 124 fathoms, U. S. Fish Commission. 



The fossil specimens differ from the recent ones only in having fewer 

 spiral striae just in front of the suture, but this is a very inconstant character, 

 and only two specimens of the fossil have been collected, so there is no reason 

 to doubt their identity. 



Another species of the group still found living in shallow water on the 

 west coast of Florida is Etmaticina seniistilcata Gray (+ Fordii Simp.). It is 

 not yet known as a fossil. In the Eocene we have 5. {Ennaticina) Boettgeri 

 Meyer arid Aldrich, and 5. Clarkeanus Aldrich, the former from Newton and 

 Lisbon, Miss., the latter from Choctaw Corners and Hatchetigbee Bluff, 

 Ala. From the Miocene of Sapote, Costa Rica, Gabb has described a N'atica 

 sculptnrata which probably belongs hereabouts. 



On the western coast there are Sigaretus scopidosus Conrad, Astoria, and 

 S. obliqua Gabb. Lysis Gabb, which has been supposed to belong in this 

 vicinity, is perhaps more likely to be related to Fossarus. In the transitional 

 Chico-Tejon beds there are a good many species related to Sigaretus, etc. 



