508 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



from Dillon Beach (a little north of San Francisco) to La Jolla, Cali- 

 fornia. The most southerly record is from Tanner Bank on the northern 

 border of Mexico. While the records of O'Donoghue from British 

 Columbia are in question, it appears certain that he had this species in 

 his C. costazii var. erecta and in my personal collection there is a 

 specimen labeled "Queen Charlotte Sound, B. C." 



Hancock Stations: 876-32, 898-38, 1130-40, 1190-40, 1232-41, 

 1269-41, 1280-41, 1410-41, all about the Channel Islands, and 1339-41 

 at Tanner Bank near the Mexican border. Numerous specimens, shore 

 to 55 fms. 



Costazia nordenskjoldi (Kluge), 1929 

 Plate 63, figs. 6-7 



Cellepora nordenskjoldi Kluge, 1929; 1946:203. 



Zoarium more or less pisiform, surrounding stems of hydroids and 

 bryozoans. The zooecia are all erected, their distal ends well separated 

 and standing up prominently on the surface of the zoarium ; the measure- 

 ments made at the growing edges are approximate, length 0.65 mm, 

 width 0.40 mm, the erected distal ends 0.30 to 0.35 mm in width. There 

 is no orientation of the zooecia, except partially at the growing edge. 

 The frontal is highly arched, smooth and shining, with a row of areolar 

 pores, the distal ones carried upward around the peristome. The primary 

 aperture, deep within the peristomial tube, is a little longer than broad 

 with a distinct sinus, about 0.18 mm long by 0.15 mm wide. The lateral 

 oral avicularia are pedicellate, usually rising prominently above the 

 edge of the peristome, the mandible semicircular. Frontal and interzooecial 

 avicularia appear to be wanting. 



The ovicell is subglobular, attached high up on the distal side of 

 the peristome, smooth and shining, about 0.30 mm wide by 0.26 mm 

 long; in earlier calcification the usual semicircular row of pores is 

 present, but the covering layer encroaches on this area on all sides 

 leaving, with complete calcification, a small rounded area near the 

 center of the ooecial front and the row of pores may be occluded. 



The species is similar to costazi in many respects but differs in the 

 smooth frontal, the higher peristome, the more elevated position of the 

 ovicell and the secondary calcification of the ovicell. 



Recorded by Kluge for the arctic seas north of Europe. 



Point Barrow, Alaska, 18 to 25 fms. Prof. G. E. MacGinitie, Arctic 

 Research Laboratory. 



