96 DEPARTMENT OF THE XAYAL SERVICE 



Doliolum sp. Oozooid stage. 



C.G.S. Acadia. 



Bigelow obtained Doliolum south of New York in 1913 (1915, p. 275), It i& 

 found regularly in the Gulf Stream. 



Summary. 



Thd Thaliacea as a ■u'hole occurred in all the outermost stations of the cruises of 

 the Acadia and at one station C' Acadia " Station 41) on the edge of the continental 

 shelf. They are typical inhabitants of tropical waters. Their presence in the north 



Fig. 1. Distribution of Thaliacea. May-June, — dotted area margined by continuous line. 

 July-August, — dotted area margined by broken line. Divided circles, — stations 

 of May-June cruises. Plain circles, — stations of July-August cruises. Solid, 

 circle. — S. vagina. Square. — S. gonaria. Lozenge. — S. [tusiforms. 

 Triangle, — & democratica. Cross, — Doliolum. 



