NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 769 



distinguish the species. It was collected by the writer in 1902 and has 

 remained unidentified in his collection for the past 50 years awaiting 

 a proper place for publication. 



Type, AHFno. 131. 



Type locality, near Port Renfrew, Vancouver Island, at the site of 

 the former University of Minnesota Biological Station ; from the rocky 

 wall of a deep tide-pool, R. C. Osburn, collector. 



Barentsia geniculata Harmer 



Plate 82, fig. 4 



Barentsia geniculata Harmer, 1915:33. 



1 Ascopodaria macropus, Robertson, 1900:345. 



The creeping stolon is thick-walled and brown, 0.06 or 0.07 mm in 

 width; the fertile internodes short, 0.30 to 0.40 mm long, the infertile 

 ones varying greatly in length to as much as 1.30 mm. The zoids are 

 tall, reaching a total length of 5.20 mm, the stalk with 1 to 4 bulbous 

 muscular joints. The stalk internodes are slender, only 0.04 mm at the 

 base and enlarging slightly upward, with a few "pores" ; the basal stalk 

 internodes are long, from 1.50 to 1.70 mm, the later ones somewhat 

 graduated in length, the shortest terminal one only 0.45 mm. The stalk 

 nodes are enlarged, muscular and bulbous, the swelling about 0.20 mm 

 long by 0.15 mm in width. The basal bulb is short and wide, about 

 0.40 mm high by 0.30 mm in diameter, coarsely wrinkled. The calyx 

 is 0.30 mm high by 0.25 mm wide. The tentacle number cannot be 

 determined accurately but they are numerous, at least 20. 



One stalk is branched twice, at the first node and again at the first 

 node of a branch. This feature resembles B. ramosa, but the nodes are 

 much smaller and the internodes more slender, while the basal bulb is 

 strikingly different. 



This is probably the Ascopodaria macropus of Robertson, for which 

 she gives no description, but states that it occurs at San Pedro, southern 

 California. I believe it to be the B. geniculata of Harmer, as it agrees 

 in the thick wall of the internodes, the form of the joints, the small 

 number of "pores" ("tubercles," Harmer), the form of the muscular 

 base and the size and form of the calyx. It differs in the longer inter- 

 nodes and in the rare formation of branches at the internodes. 



Harmer described the species from the East Indies (Siboga Expedi- 

 tion). 



Hancock Station 1292-41, near Santa Rosa Island, southern Cali- 

 fornia, 33°53'30"N, 120°W, at 28 fms, two fragments. 



