28 University of California Publications. [zoology. 



The " branehlets" ou which the gonophores are borne are no less 

 like peduncles than those of the B. vestita which Allman figures. 

 They are similar to hydranth-bearing branches in color, dia- 

 meter and the transverse wrinkling of the perisarc characteristic 

 of the species.* 



In the gonosome, then, as in the trophosome, G. annulata is 

 intermediate between the types of Bimeria and darrein, possess- 

 ing and combining the essential characters of each. It seems 

 no longer desirable, therefore, to retain both generic names. 

 Originally both appeared on the same page of one of T. S. 

 Wright's papers (1859, p. 109), with Bimeria first. This name 

 will consequently take precedence. 



Bimeria annulata Nutting. 



PI. I. Pigs. 1, 2, 3. 

 Garoeia annulata, Nutting, Proe. Wash. Ac. So., 1901, III, p. 165. 

 Distribution. Santa Catalina I., Cal., 42 fathoms; San 



Francisco Entrance, Cal., between tides. Yakutat and 



Sitka, Al. (Nutting). 



Bimeria franciscana, sp. nov. 



Plate I. Pig. 4. 



Trophosome. Stems rising to the height of about 70 mm. in dense clusters 

 from a tangled hydrorhiza which creeps over the bases of the stems for a 

 few millimeters. Branches arise at short intervals in all planes; some may 

 be more than half as long as the main stem. On these are borne secondary 

 branches, which have hydranths. All secondaries borne on the distal side of 

 the branches, alternately to right and left. Hydranths fusiform with 14-16 

 tentacles; conical hypostome. 



Perisarc of the main stem moderately thick, smooth, without annula?. On 

 the branches it is much thinner and roughened by irregular wrinkles which 

 extend to hydranths. A few more or less definite annula? at the origin of 

 the branches and branehlets. Body of each hydranth invested with perisarc. 

 Color brown throughout. 



Gonosome. Sporosacs with very short peduncles borne irregularly on 

 secondaries and ultimates in the proximal half of the colony in abundance. 

 Female with prominent spadix and one or two ova. Invested with a layer of 

 perisarc. 



Distribution. San Francisco Bay, between tides. 



* The annulation of the stem is by no means so regular and prominent as the 

 figure in Nutting's paper (1901, PI. XVI, fig. 1) would lead one to suppose, nor are 

 the gonophore stalks there shown typical for all colonies. 



