232 BULLETIN OF THE 



Finally, what appears to be an undoubted specimen of Sconsia striata La- 

 marck has been dredged by the U. S. Fish Commission at Station 2640, in 

 85 fms., sand, ofF Cape Florida. I have exactly the same shell from the East 

 Indies, where it was collected by the Wilkes Exploring Expedition, and it is 

 very doubtful if there is more than one species yet known, those which have 

 been named seeming to differ but varietally. Like other shells of this fiimily, 

 the adults differ very widely in their size at maturity, having a range in this 

 respect fully equal to that of the various species of Cyprcea. 



Family DOLIIDiE. 



It is probable that this should form only a subfamily under Cassididce, but 

 is be 

 action. 



it is better to await fuller knowledge of all the forms before taking decisive 



Genus DOLIUM Lamarck. 



Dolium galea L. and D. perdix L. extend their range northward to Florida, 

 and the former has even been reported from Beaufort, N. C. It has several 

 synonyms, especially 1). antillarum Morch, which does n^t differ from the type. 

 D. perdix is widely known under the names oi pennatum Martini and phimatum 

 Green, while its greenish yellow horny larval shell was described as Helix 

 sulftirea by Prof. C. B. Adams. 



Subgenus EUDOLIUM Dall. 



DoUopsis Monterosato, non Conrad. 



Eudolium Crosseanum Monterosato. 



Plate XV. Fig. 5. 



D. Crosseanum Allery de Monterosato, Journ. de Conchyl., XVII. p. 228, pi. xii. 



fig. 1, 1869. 

 D. Bairdii Verrill & Smith, Am. Journ. Sci., XXII. p. 296, Oct. 1881. Trans. Conn. 



Acad., V. p. 615, VI. p. 253, pi. xxix. figs. 2 a-b, 1884. 



Habitat. Station 192, off Dominica, in 138 fms., sand. Station 291, off 

 Barbados, in 200 fms., stony bottom, temperature 49°. 7 F. Off Havana, in 

 292 fms. Northward to Martha's Vineyard, in 89-234 fms., Verrill. Deep 

 water off Palermo, Italy, Monterosato. 



A living specimen taken off Delaware Bay by Captain Tanner might have 

 served as a model for the figure in the Journal de Conchyliologie. But most 

 of the specimens I have seen from the Antilles, dredged by the Fish Commis- 

 sion, are smaller, though adult. There is a tendency for the primary spirals to 

 be darker brown, and even articulated with dark and light brown. The nucleus 

 is very large, olive greenish, but in the adult lined with white shelly matter, 

 which, when the horny larval shell is peeled off, as often happens, reproduces 



