MUSEUM OF COMPARATIVE ZOOLOGY. 241 



ica; Station 272, in 76 fnis., near Barbados; also in 94-140 fms., at Barbados, 

 all (load. Near Cape Ilatteras, in 25-50 fma., U. S. Fish Commission. Co- 

 runna, Spain, McAndrew. 



This species ranL,'es farther nortli than any other yet known, on the eastern 

 coast of the United States. It is easily recognized by the continuous trans- 

 verse lines, uninterrupted by any dorsal groove, and its white color. It is 

 T. olorina Duclos and T. approzimans Beck. 



Trivia globosa Gray. 



Trivia glohosa Gray, Roberts, Bull. M. C. Z., IX. p. 137, 1881. 

 T. pilula Kiener, and T. sphccrula Mighels,yi(/e Roberts, 1885. 



Habitat. Station 2, 805 fms.; Station 247, near Grenada, in 170 fms.; Sta- 

 tion 276, near Barbados, in 94 fms. All dead. U. S. Fish Commission Sta- 

 tion 2373, in 23 fms., coral bottom, in the Gulf of Mexico, living. Station 

 2330, dead, in 121 fms., at Key West. Fossil in the Caloosahatchie pliocene. 



Roberts thinks that Krebs's Trivia subrostrata var. alba is referable to this 

 species. 



Trivia quadripunctata Gray, var. rotunda Kiener. 



Trivia quadripunctata Gray, Roberts, Bull. M. C. Z., IX. p. 137, 1881. Tryon, Man., 

 VII. p. 201, pi. xxii. figs. 5, 6. 



Habitat. Yucatan Strait, 1 living, 640 fms.; Station 2, 805 fms.; Station 

 12, 177 fms.; Barbados, living, 100 fms.; Sigsbee, off Havana, 80 fms. Flor- 

 ida Keys, in 2-4 fms., living, and abundant in the Antilles, in similar 

 situations. 



I do not understand how living specimens found their way into jars labelled 

 100 and 640 fms. I do not believe the shells lived at that depth, and suspect 

 they may have remained in the dredge or sieve, unseen, from a previous dredg- 

 ing in shallow water. The specimens, except the two living ones, are all of 

 the variety rotunda Kiener, which differs from the type in being shorter, 

 rounder, paler, and with the spots obsolete. As with the other species, the 

 identifications have been confirmed by Mr. S. R. Roberts, who has made a 

 special study of the Cyprceidce. 



Genus ERATO Risso. 



Erato Maugeriae Gray. 



This species extends from Cape Hatteras to Jamaica, and from Florida to 

 Vera Cruz and Aspinwall. It is the only species known from the region. It 

 is fossil in the pliocene of the Caloosahatchie River, Florida. Erato cyproeoides 

 C. B. Adams is not in the least like it, being white, cyprseiform, with an im- 



VOL. XVIII. 16 



