NO. 2 osburn: eastern pacific bryozoa — cheilostomata 281 



The species is widely distributed in tropical and temperate seas, but 

 appears not to have been noted on the Pacific coast of America except 

 for the record of Hastings at Panama and that of Canu and Bassler at 

 Galapagos. 



In the Hancock collections it has been noted at 23 stations ranging 

 southward from Santa Catalina Island, southern California, to Ecuador 

 and the Galapagos Islands, including stations from west Mexico, Socorro 

 and Clarion Islands, the Gulf of California, Cocos Islands, Panama and 

 Colombia. Low water to 100 fms. 



Trypostega claviculata (Hincks), 1884 

 Plate 30, fig. 11 



Lepralia claviculata, Hincks, 1884:23. 

 Trypostega claviculata, Levinsen, 1909:281. 



Zoarium similar to that of T. venusta. The zooecia are also similar, 

 but are somewhat larger, ranging from 0.40 to 0.65 mm in length. The 

 aperture is different in size and form, measuring about 0.13 mm in either 

 dimension, the same strong triangular cardelles present, but the sinus 

 is wider and shallower. The zooeciules are larger and more frequently 

 wanting, and the aperture which Hincks figures as a clavicular opening, 

 is closed by a spatulate avicularium. 



The ovicell, with its zooeciule cover, is unusually large, about 0.40 

 mm long and varying in width from 0.30 to 0.45 mm; somewhat tri- 

 lobate in form, with the middle lobe large and carinate. 



Hincks described the species from Houston Stewart Channel and 

 Cumshewa, British Columbia. Levinsen studied Hincks' material, but 

 otherwise I have found no reference to it. 



Hancock Stations 1242, off Point Loma; 1281-41, Santa Rosa Island; 

 off Santa Catalina Island, and off San Pedro, all from southern Cali- 

 fornia, shallow water to 40 fms. 



Genus HARMERIA Norman, 1903 



"Zooecia ovate, thin, glassy, hyaline, with a scutiform or ovate area 

 on the front, distinctly circumscribed by a raised line, within which 

 the surface in punctate. Oral aperture semielliptic ; lip straight in the 

 younger stage, but afterwards overhung by a suboral collar-like process 

 with more or less developed rostrum. No visible ooecia. No avicularia" 

 (Norman 1903:107). Genotype, Lepr alia scutulata Busk, 1855:255. 



