328 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



The ovicell is rounded, prominent, slightly flattened, with numerous 

 pores; the secondary layer of calcification leaves a rounded perforated 

 area above the orifice ; width about 0.40 mm. 



O'Donoghue named the species for the orderly arrangement of the 

 zooecia, which is quite evident in the primary layer on smooth surfaces, 

 but in superficial layers the zooecia are oriented very irregularly ; Gabriola 

 Pass, British Columbia and San Juan Island, Puget Sound. 



Hancock Stations: 1123-40, San Nicolas Island; 1232-41, of? San 

 Pedro breakwater; 1283-41, Santa Rosa Island; 1295-41, Santa Cruz 

 Island, all off southern California; 1896-49 middle of Tanner Bank, 

 United States-Mexican boundary (the most southern record). Also off 

 Del Monte, California, Dr. R. L. Bolin, collector. Depth range 20 to 

 35 fms. 



Dakaria pristina (Hincks), 1883 

 Plate 39, figs. 3-4 



Schizoporella pristina Hincks, 1883 :448. 

 Dakaria pristina, O'Donoghue, 1926:60. 



Zoarium encrusting on stones and shells. Zooecia moderately large, 

 0.60 to 0.80 mm long by 0.40 to 0.50 mm wide, often quite regularly 

 elongate-quadrilateral in form ; the frontal ventricose and the zooecia 

 separated by rather deep grooves within which are raised lines. The 

 frontal tremopores are large and become more or less infundibuliform. 

 The primary aperture is nearly round, sometimes a little longer than 

 wide and again it is slightly shorter than the width, averaging about 

 0.20 mm in each dimension ; in any case the operculum has the form of 

 the aperture and is provided with a comparatively broad, complete 

 bordering sclerite, the muscle attachments being at the margin. The 

 cardelles are large and prominent, the anter a semicircle and the poster 

 nearly as large, its proximal border usually seeming to be a continuation 

 of the same circle as that of the anter. The appearance of the aperture 

 is exactly represented by Hincks, 1883, pi. 17, fig. 6. The peristome is 

 low, slightly higher on the proximal border and roughened with low 

 tubercles. No spines, no avicularia. 



The ovicell is large, rounded, about 0.40 mm wide, bordered by a 

 thick, rough collar which leaves a large roughly triangular frontal area 

 with large irregular pores; closed by the operculum. 



Recorded by Hincks from Dolomite Narrows, and by O'Donoghue 

 from Gabriola Pass and ofif Round Island, British Columbia. 



Hancock Collections, Tomales Bay, Dillon Beach, California, sev- 

 eral specimens on stones, R. J. Menzies, collector. 



