NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA — CYCLOSTOMATA 749 



The zoaria are stolonate, creeping. The zooecia may be clustered, 

 arising from short lateral internodes of the stolon. The pedicel is slender, 

 measuring between 0.03 and 0.04 mm in diameter near the base, becom- 

 ing slightly enlarged toward the zooecia proper. At the point of junction 

 with the zooecia, the pedicel becomes transversely wrinkled. The zooecia 

 are elongate, elliptical, ranging in length from 0.80 to 1.25 mm, and in 

 width from 0.16 to 0.23 mm. A flattened frontal area extends the full 

 length of the zooecia proper. The polypide does not have a gizzard. 

 The tentacles number 12. 



There is some variation in the length of the pedicels, but they are 

 usually about twice the length of the zooecia. The longest measured 

 2.40 mm, which when combined with its zooecial measurement of 1.19 

 mm, gave a total height of 3.59 mm. 



This species has been previously reported in the cool waters of Eng- 

 land and northern Europe. In the eastern Pacific it has been previously 

 reported from the Vancouver Island region. 



The specimens in the Hancock collection are from Canoe Bay, Alaska, 

 and Union, Washington. The depth of the Alaskan specimens is un- 

 known; those from Washington were collected at 10 fathoms. 



Triticella elongata (Osburn), 1912 

 Plate 80, fig. 5 



Hippuraria elongata Osburn, 1912:256. 

 Triticella elongata, Osburn, 1944:26. 



Zoaria living in the gill chambers of the pea crab, Scleroplax granulata 

 Rathbun. The adnate stolons give rise to erect zooecia, which are usually 

 paired in clusters. The zooecia arise from short internodes, rather than 

 directly from the stolons. The zooecia range in length from 0.90 to 

 1.80 mm, including the pedicel. The length of the zoids proper ranges 

 between 0.50 and 0.90 mm. In width, the zooecia range from 0.18 to 

 0.24 mm. The polypide has 16 to 18 tentacles. 



Osburn, 1944:26, reports this species from Chesapeake Bay, and its 

 geographical distribution on the Atlantic coast of North America from 

 Vineyard Sound, Massachusetts to Beaufort, North Carolina. It has 

 not been previously reported from the eastern Pacific. 



Specimens in the Hancock collection are from Elkhorn Slough, 

 California, collector R. I. Smith. No depth data available. Found on 

 Scleroplax granulata Rathbun. 



