80 University of California Publications. [zoology. 



sparsely and irregularly branched. Gonosome absent in colonies 

 collected in San Pedro Harbor, December 30, 1901. Male gono- 

 thecae are present in colonies from San Diego (July) and Mon- 

 terey (December) . They may be borne in pairs on the stem, one 

 on each side of the shoulder that supports each hydroeladiuin. 

 The members of each pair are not of the same age, one being 

 mature before the other is half grown. Mature male gonophores 

 are elongated and compressed, the proportions of length, breadth, 

 and thickness being as 10:4:2. The neck is moderate, with a 

 small circular terminal aperture. 



Large colonies dredged off San Diego in 1-25 fathoms, on 

 sandy and rocky bottom; also on float in San Pedro Harbor, and 

 outside the harbor in several fathoms, on sandy bottom covered 

 with loose masses of Nitrophyllwm. Small colonies on kelp and 

 eel grass, Avalon, Catalina I. 



