NO. 2 OSBURN: eastern pacific BRYOZOA CHEILOSTOMATA 313 



the ovicell nor the spatulate avicularia. From D. (M.) marionense 

 Calvet it differs in the shape of the frontal area of the ovicell, the 

 rounded instead of triangular oral avicularia and in the much narrower 

 apertural sinus. 



Type, AHF no. 59. 



Type locality, 1435-41 off Santa Cruz Island, California, 33° 56' 

 OO^'N, 119°50'55''W at 48 fms. Also at Sta. 1130-40, off Abalone 

 Point, Laguna Beach, at 25 fms; 1413-41, off Cardwell Point, San 

 Miguel Island, 27 to 48 fms; 1294-41, off Gull Island, (Santa Cruz 

 Island), 41 fms; 1938-50, off Anacapa Island, 37 fms; and 1391-41, 

 Santa Rosa Island, 40 fms, all off southern California. 



Genus PAGHYEGIS new genus 



Zoarium encrusting. Zooecia large with an excessively thick frontal 

 covered by a thick ectocyst and perforated by large pores. The ovicell is 

 hyperstomial but deeply embedded and covered with a thick crust like 

 the frontal, which also forms a broad fold above the orifice. Primary 

 aperture semielliptical with a straight, proximal border and without a 

 sinus. Primary peristome low and thin, surrounded by and usually ob- 

 scured by a thick fold of the frontal on the lateral and distal sides. 

 Often with a rounded suboral umbo and between this and the aperture 

 there is a minute rounded suboral avicularium, frequently wanting. No 

 oral spines ; no cardelles. Multiporous septulae in the lateral and distal 

 walls. Genotype, Porella princeps Norman, 1903:114. 



Pachyegis princeps (Norman), 1903 

 Plate 33, figs. 5-8 



Porella princeps Norman, 1903:114. 



fDiscopora megastoma, Smitt, 1871:1128. 



Monoporella spinulifera var. praeclara Hincks, 1892:152. 



Porella princeps, Levinsen 1916:465. 



Porella princeps, Nordgaard, 1918:72. 



Zoarium forming a coarse reddish-brown crust, occasionally multi- 

 laminar, over considerable areas on stones and shells ; the largest colony 

 observed measures about 60 mm in length and width. The zooecia are 

 very large, often more than a millimeter long by 0.60 to 0.70 mm wide 

 and deep in proportion ; very irregularly ovate, highly arched and sepa- 

 rated by deep grooves. Abnormal zooecia are common, sometimes merely 

 reduced in size and occasionally without an aperture. When the thick 



