NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 747 



Buskia nitens Alder, 1857 

 Plate 80, fig. 1 



Buskia nitens Alder, 1857:156. 

 Buskia nitens J Hincks, 1884:208. 

 Cylindroecium repens O'Donoghue, 1923:192. 

 Buskia nitenSj O'Donoghue, 1926:60. 



Zoaria minute, repent, inconspicuous. Stolons thin, thread-like, sub- 

 divided by septa into internodes. Zooecia very small, ranging in length 

 from 0.31 to 0.50 mm. The zooecia arise directly from the stolons and 

 in most cases, but not invariably, the proximal one-third of a zoid is 

 adherent to the stolon and the substrate, with the distal two-thirds free. 

 In some cases the entire zoid arises directly away from the stolon and 

 is free in its entirety. Proximally, some zooecia exhibit one or two pairs 

 of short thorn-like protuberances. Distally, some zooecia show a short 

 setigerous collar projecting from the aperture. 



This species is evidently well distributed in both warm and cool marine 

 waters, but because of its minute size is easily overlooked. It has been 

 reported from England, Brazil, Puerto Rico, and British Columbia. 



Hancock Stations: 277-34, Isabel Island, Mexico, and 1407-42, Coos 

 County, Oregon, intertidal to 25 fms. 



Buskia seriata Soule, new species 

 Plate 80, fig. 2 



Diagnosis: Zoaria erect, branching. Stolons robust, septate, bearing 

 clusters of short stocky zooecia arranged in a paired linear series, alter- 

 nate, and arising directly from the stolon. Zooecia wrinkled distally 

 and may exhibit a setigerous collar protruding from the aperture. The 

 polypide contains a prominent gizzard. The tentacle number is 8. 



Description: The zoaria are large, branching, erect, macroscopically 

 bearing a superficial resemblance to specimens of the genus Amathia. 

 The stolons are robust, septate, with internodes of variable length, rang- 

 ing from 0.90 to 1.30 mm, and in width from 0.07 to 0.09 mm. The 

 zooecia, which are arranged in clusters, arise from the stolon in an 

 irregular alternate, paired linear series. These zooecial clusters may 

 contain from 5 to 14 short, stout zooecia, with 11 occurring most fre- 

 quently. On the younger stolonal branches only 1 or 2 developing 

 zooecia may be in evidence. Invariably, there is but a single zooecial 

 cluster to each stolonal internode. The zooecia arise directly from the 

 stolon. The proximal portion of the zooecium is constricted, but the 

 body proper rarely adheres to the stolon or substrate for any distance, 



