vol.i.] Torrey. — Hydroida of the Pacific Coast. 37 



Fam. Pennariid.e. 



" Hydroeaulus branched or unbranehed. Hydranths much enlarged 

 proximally with one ring of large filiform tentacles about the base and with 

 another set of capitate or filiform tentacles distributed irregulary or regu- 

 larly. Proboscis conical, short, and not distinctly limited but passing 

 gradually into the hydranth. Gonophores in the form of medusse or of 

 sporophores." (Calkins, '99, p. 335, translated from Schneider, '97.) 



Corymorpha. 



Trophosome. Hydranths solitary, rooted by filamentous processes; with 

 several whorls of closely set distal and one whorl of larger proximal fili- 

 form tentacles. Cavity of stalk in the shape of a number of superficial 

 longitudinal canals of equal size. Perisarc thin, non-supporting. 



Gonosome. Gonophores borne between proximal and distal tentacles, 

 medusiform, fixed or free, with four radial canals and one to four tentacles, 

 all of which may be rudimental. 



Corymorpha palma, sp. nov. 



PI. II. Fig. 21. 



Trophosome. Stem 2-4 inches long, rooted in the sand by a dense tangle 

 of filamentous processes and covered by perisarc proximally for i or 

 i its length. Thickest near proximal end, tapering gradually into 

 a narrow neck which supports the hydranth. Hydranth with 18-30 proximal 

 tentacles in one whorl, with a span of an inch or less; distal tentacles more 

 than twice as numerous, more or less irregularly placed around the mouth 

 in several whorls. 



Gonosome. Gonophores medusoid, permanently fixed to peduncles spring- 

 ing from the base of the proboscis just within the whorl of proximal tenta- 

 cles; each with a ring canal, four radial canals, and a manubrum at least 

 twice as long as the bell, without a mouth; tentacles, wanting; velum mav 

 be present or absent. 



Distribution. San Pedro, Cal., throughout the year; be- 

 tween tides. 



This species resembles the eastern C. pendula closely, but 

 differs in lacking all but the merest rudiments of tentacular 

 processes on the medusa bell, which is much shorter, relatively 

 to the manubrium, than in G. pendula. Nor is the color a 

 "bright pink" (Agassiz), it being an extremely delicate pink, if 

 it can be said to have any color at all in hydranth and stem. The 

 endoderm of the gonophores is usually furnished with green 

 color bodies. 



I was long in doubt as to whether the gonophores ever became 

 free. On individuals collected in summer and winter months, 



