NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 691 



our largest specimen: height 1.75 mm, width of base 1.20 by 1.30 mm, 

 width of stem 0.53 mm, length of stem 0.60 mm, height of capitulum 

 1.15 mm, width of capitulum 1.57 by 1.70 mm, height of fascicles 

 0.25 mm. 



The ovicell is very large, conspicuous, rounded and bulbous and is 

 situated on the under (dorsal) side of the capitulum close to the base 

 of the fascicles, its width 0.55 by 0.65 mm. A portion of the wall is 

 broken away and the ooeciostome is wanting. On another, somewhat 

 smaller, specimen there is a smaller ovicell of similar appearance, and 

 it also has been injured. 



At first I presumed this to be D. canadensis O'Donoghue, 1926:26, 

 but it is much smaller, the ovicell is strikingly different in form, and 

 O'Donoghue describes the capitulum as broad and flattened. 



Type, AHF no. 124. 



Type locality, off Rocky Point, southern California, about 33°49'N, 

 encrusting on a sunken buoy at a depth of 45 fms, three colonies. 



Discocytis canadensis O'Donoghue, 1926 



Super cytis digitata, O'Donoghue, 1923:16. 

 Discocytis canadensis O'Donoghue, 1926:26. 



This species has not been found in the Hancock Collections, but the 

 following digest of O'Donoghue's description is here given to indicate 

 the differences. Zoarium cupuliform; base small, flat and circular; stalk 

 short, narrow, expanding into a broad, flattened funnel-shaped capitulum, 

 from the edge of which a number of pinnules radiate outward; each 

 pinnule (fascicle) consists of 12 to 20 tubes closely connate. Largest 

 specimen 4 mm high, the stalk 1.75 mm thick, and the capitulum 7.25 

 mm across. 



Ooecium transversely elongate, sinuous, running up slightly between 

 the bases of the fascicles, its breadth one fifth to one fourth of the cir- 

 cumference. Ooeciostome a circular aperture surrounded by a flattened 

 ring-like margin, sub-terminal near the middle of the ooecium. 



Recorded by O'Donoghue from a number of localities on the British 

 Columbia coast and south to the San Juan Islands in Puget Sound. 



