116 BIOLOGICAL SURVEY OF 



Class HYDROZOA 

 Order HYDROIDA Hydroids 



Suborder ATHECATA 



Clavidae 

 Clava Gmelin 

 C. LEPTOSTYLA L. Agassiz. (Hincks, 1868, p. 6, pi. 2, fig. 1.) 

 A common species, especially abundant on Fucaceae. 

 Dredged only once, on blue clay, depth 194 feet. Sexually 

 mature, end of June, 1927. Stations : D 131 ; S 4, 13, 26, 28, 

 31, 39-41. 



CoRYNiTis McCrady 



C. AGAssizii McCrady. (Nutting, 1900, p. 329, fig. 4.) 

 Three specimens from stem of Pyura ovifera, depth 90 feet. 

 Station: D 20. 



Bougainvilliidae 

 BouGAiNviLLiA Lesson 

 B. CAROLiNENSis (McCrady). (Nutting, 1900, p. 330, fig. 5.) 

 Taken on hard bottoms, from shore to 150 feet. Stations : 

 D18, 32, 39, 40, 52, 60; S 4, 14. 



Hydractinia Van Beneden 

 H. POLYCLiNA L. Agassiz. (Nutting, 1900, p. 335, fig. 12.) 

 Found only on shells inhabited by hermit crabs, from shore 

 to 330 feet.' Stations : D 20, 67, 94, 139 ; S 9. 



Eudendriidae 

 EuDENDRiUM Ehreiiberg 



These forms are quite variable and specific differences are 

 slight. Hence the determinations are doubtful and further 

 study may show some of the species to be identical. 



E. RAMosuM (Linne). (Hincks, 1868, p. 82, pi. 13.) Taken 

 on hard bottoms, depths 39 to 100 feet. Stations : D 10, 37, 

 38, 71, 94. 



E. DisPAR L. Agassiz. (Nutting, 1900, p. 332, fig. 7.) Also 

 taken on hard bottoms, depths 65 to 95 feet. Stations : D 39, 

 40, 56, 75. 



