vol.1.] Torrey. — Hydroida of the Pacific Coast. 73 



Aglaophenia pluma (Linn.). 



PI. X. Figs. 90, 91. 



Sertularia pluma, Linn., Syst. Nat. 



Aglaophenia pluma, Lamx., Hist. Pol. Flex., 1816. 



Aglaophenia pluma, Hineks, Brit. Hydr. Zooph., 1868, p. 286. 



Distribution. Off Coronado, Cal., on kelp. South Africa. 

 Belgium. Naples. Messina (30-40 fathoms). Gt. Britain 

 (Hineks). 



A. pluma has not been reported previously from North 

 America, I believe. It is readily distinguished from the other 

 species of Aglaophenia on the Pacific Coast by its non-recurved 

 median tooth and the contrast of colors, first, between the dark 

 brown stem and light brown hydrocladia ; second, in the arched 

 corbnlae, which are light brown, with dark brown stripes along 

 the ribs. Three or four stems arise from the same spot on the 

 kelp, to the height of 25-35 mm. Spread of hydrocladia 

 8-10 mm. 



Aglaophenia struthionides (Murray). 



Plumularia struthionides, Murray, Ann. N. H., (3), V, 1860, p. 251. 

 Aglaophenia franciscana, A. Ag., 111. Cat. N. A. Aeal., 1865, p. 140. 

 Aglaophenia arborea, Verrill, Rep. Comm. Fish and Fisheries, 1871-72, 



p. 730. 

 Aglaophenia struthionides, Clark, Trans. Conn. Ac, III, 1876, p. 272. 



Distribution. Puget Sound to San Diego, 1-32 fathoms. 



This species was obtained in almost every haul of the dredge 

 off the Southern California coast. It is quite variable, especially 

 in the length of the hydrocladia, the character of the teeth on 

 the hydrothecae and the length of the mesial nemetophores. 

 There are often two hydrothecae at the base of each corbula, 

 instead of three. Branches are frequently present, though not 

 commonly numerous. Corbulae present in Januai'.v, June, July 

 (University of California Collection). 



Antenella Allman. 



Trophosome. "Colony consisting of hydrocladia springing directly from 

 the hydrorhiza without the intervention of stems or branches; hydrocladial 

 internodes and hydrothecae as in the catharma group of the genus Plumu- 

 laria." (Nutting, '00.) 



Gonosome. Gonothecae ovate, unprotected. 



