NO. 2 OSBURN: eastern pacific BRYOZOA — CHEILOSTOMATA 409 



The ovicell is comparatively large, 0.24 to 0.28 mm wide, very 

 prominent, w^ith numerous pores each of which is slightly tubular; the 

 peristome joins the proximal corners of the ovicell but is not continued 

 across the front. The species is unusually prolific, nearly every zooecium, 

 except the first 2 or 3 rows, bearing an ovicell. 



This species differs from S. reticulata, with which Dr. Robertson 

 placed it, in a number of ways, especially in the nature of the avicularium, 

 the characters of the ovicell and the appearance of the frontal. Miss 

 Robertson described and listed it from La Jolla, California, and the 

 Coronado Islands, just south of the Mexican border. The S. reticulata 

 of Okada and Mawatari (1936:64) appears to be the same as they refer 

 to the avicularium as "oval or elliptical, somewhat elevated, placed just 

 below the rimule on the median longitudinal axis of the zooecium." Since 

 the species appears not to have been properly recognized it is named, as 

 a new species, for its remarkable reproductive capacity. 



Type, AHF no. 87. 



Type locality, Hancock Station 1449-42, Newport Harbor, southern 

 California, on a float, 34°35'47''N, 117°52'55''W. Also taken at Han- 

 cock Stations: 1178-40, Santa Catalina Island; 1217-40, Point Fermin; 

 1232-41, off San Pedro Breakwater; 1283-41, Santa Rosa Island; 1295- 

 41 and 1662-48, Santa Cruz Island; all from southern California. Also 

 Albatross Station 2945, southern California, and San Ignacio Lagoon, 

 Lower California, Dr. C. L. Hubbs, collector. It is a common species 

 on piles and floats and along shore and down to 45 fms, but has not 

 been noted north of Point Conception, California, nor south of the San 

 Ignacio Lagoon, Lower California. 



Smittoidea reticulata (MacGillivray), 1842 

 Plate 48, figs. 9-10 



Lepralia reticulata J. MacGillivray, 1842:467. 



Smittia reticulata, Hincks, 1880:346. 



Smittina reticulata, Nordgaard, 1918 :60. 



Smittina reticulata, Canu and Bassler, 1929 :337 ; 1930 :27. 



Not Smittia reticulata, Robertson, 1908 :306 (see Smittoidea prolifica). 



The zoarium encrusts shells, corallines, etc., small, white or pale 

 yellow. The zooecia are moderate in size, 0.40 to 0.55 mm long by about 

 0.30 mm wide ; ventricose and distinct when young but becoming nearly 

 flat with age; the frontal a coarsely granulated pleurocyst with con- 

 spicuous areolar pores which have high ribs between them. The primary 

 aperture measures 0.12 mm in width by 0.10 mm long, rounded with 



