Pomuna CoUejic Clart'iiioiit. California 13 



missuralis, on live Mytilus. Abundant. With medusae in Decem- 

 ber, 1920. 



CoRYMORPHiDAE : Large, solitary hydranth with basal and 

 distal whorls of filiform tentacles. Medusae produced just within 

 basal tentacles. 



Conjmorpha palma Torrey. Hyd. Pacific Coast. U. C. pub. 

 Zool. vol. 1, no. 1, p. 37. 



A very large and beautiful species found abundantly in quiet 

 pools. Solitary, rooted in sand by filamentous processes. Proximal 

 tentacles 18-30 in number. Balboa Bay, in sandy pool. Usually 

 numerous in unexposed places. 



Tubulariidae: Solitary or colonial. Large, often bright 

 pink in color. Hydranths with a basal and a distal whorl of filiform 

 tentacles. Sporosacs are pendant clusters. 



Tubularia crocea (Ag.) Allman. Gym. Hyds. 1871. Dense col- 

 onies, 8-10 cms. i"n length. Few branches. About 20-24 basal ten- 

 tacles. On piles with other hydroids. tunicates, Crustacea and 

 mollusca. Low tide, December, 1920. Long Beach, Gal. 



Tubularia sp. Distinguishable from above species in several 

 characters but not corresponding with any available discriptions. 

 I am not inclined to think it the T. marina of Torrey. Growing 

 with the above species at Long Beach. Rather rare. Probably the 

 same species discussed by Professor Bean in the Fourth Laguna 

 Report of Pomona College. Specimens also collected during the 

 summer of 1921. 



Sertulariidae : Colony usually branching; hydrothecae ses- 

 sile, forming a double row along opposite side,> of hydrocaulus; 

 gonangia large, few, no free medusae. 



Sertularia furcata Trask. Proc. Calif. Acad. Sc, 1854, I, p. 

 112. 



This is a very variable species but ours are typical and agree 

 with figured specimens of several authors. Gonangia were numer- 

 ous on colonies taken at Huntington Beach, April, 1921, from piles 

 under the pier. Numerous, on stalks of algae and on rope. 



Sertularia tricKspidata Hincks. Hist. Brit. Zoophytes. London, 

 1868. 



This is a very common species at Laguna Beach, .growing in 

 great numbers on Fucus with other hydroids. Inshore tide zone. 

 January, 1921. With a creeping rootstock on which there are a few 

 gonangia, ripe. Hilton. 



