NO. 4 FRASER : HYDROIDS 3 



CLASSIFICATION AND DESCRIPTION 



As all of the species except the 6 that have been described as new have 

 been fully treated in the volume on Atlantic hydroids, it is quite unneces- 

 sary to include an extensive synonymy here. As usual, there is a reference 

 to the original description of the species, and to this is added a reference 

 to the description and synonymy as it is given in the Atlantic work. As 

 in this Atlantic volume all the literature used for reference in this paper 

 has been cited, no bibliography is necessary. 



Where the distribution record supplied makes an appreciable exten- 

 sion of the previously known distribution range of the species, the 

 extension is indicated. 



Sub-order GyMNOBLASTEA 



Family Gorynidae 



Genus ZANCLEA 



Zanclea costata Gegenbaur 



Zanclea costata Gegenbaur, Zeitsch. Wissen. Zool., 1856, p. 229. 

 Fraser, Atlantic Hyd., 1944, p. 43. 



Distribution. — Caledonia Bay, on floating sargassum. 



This record, some considerable distance from Diy Tortugas, takes 

 the species somewhat nearer to the passage through to the Pacific, on the 

 way to Braithwaite Bay, Socorro Island, where it has been reported. 



Family Eudendridae 

 Genus EUDENDRIUM 

 Eudendrium exiguum Allman 

 Eudendrium exiguum Allman, Gulf Stream Hyd., 1877, p. 6. 



Fraser, Atlantic Hyd., 1944, p. 68. 

 Distribution. — 7 miles north of Margarita Island, 17-22 fathoms. 

 This extends the range southward from Florida Reef and Sand Key, 

 in the direction of the locations in the Eastern Pacific. 



Eudendrium laxum Allman 

 Eudendrium laxum Allman, Gulf Stream Hyd., 1877, p. 7. 



Fraser, Atlantic Hyd., 1944, p. 71. 



Distribution. — 3 miles north of Coche Island, 21-22 fathoms. 

 The record marks a southern extension of the range of the species 

 from south of Marquesas Island, near Key West, Florida. 



