70 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Hancock Stations: 147-34, Tagus Cove, Albemarle Island, Galapa- 

 gos, 30 fms; 788-38, Daphne Major Island, Galapagos, 70 to 80 fms; 

 1232-41, off San Pedro breakwater, California, 19 fms; 1410-41, Santa 

 Rosa Island, California, 17 fms; and 275, Raza Isla, Gulf of California, 

 40 fms. Apparently it is much more abundant in its northern range. 



Gallopora whiteavesi Norman, 1903 



Plate 6, fig. 6 



Callopora whiteavesi Norman, 1903 :589. 

 Membranipora lineata, Smitt, 1867 (in part, PL 20, fig. 26). 

 Membranipora whiteavesi, Levinsen, 1916:443. 

 Callopora whiteavesi, Osburn 1932:8. 



Zoarium encrusting. Zooecia of moderate size, 0.50 to 0.60 mm long 

 by 0.35 to 0.40 mm wide, the oval to elliptical opesia occupying about 

 three-fourths of the length. The zooecia are well separated by rather 

 broad grooves ; the cryptocyst granulated and without horizontal lamina, 

 the gymnocyst smooth. The spines, 8 to 11 on each side, are long and 

 more or less erect, the distal ones directed forward ; a few smaller termi- 

 nal spines are sometimes present beyond the distal rim. Avicularia ap- 

 parently are entirely wanting. 



The ovicells are globose, prominent, smooth or delicately frosted with 

 minute tubercles ; in complete calcification there may be a slightly raised 

 rib enclosing a triangular area on the front. 



Described by Norman from East Finmark, Norway; since recorded 

 by Levinsen from Greenland, and by Osburn from Ungava, Hudson 

 Strait, and Port Churchill, Manitoba. The present records indicate that 

 it probably has a circumpolar distribution. 



Canoe Bay, Alaska, along shore, (U. S. Alaska Crab Investigation) ; 

 Point Barrow, Alaska, 12 fms, G. E. MacGinitie, Arctic Research Lab- 

 oratory. 



Callopora inconsplcua (O'Donoghue), 1923 



Membranipora inconspicua O'Donoghue, 1923:29. 



The small zooecia are oval, tending toward polygonal. The edges are 

 covered by a thin, almost transparent, white lamella, which passes up- 

 ward to a fairly regular oval aperture. The opesia has a sort of curved 

 border around it, wider at the posterior end. Commonly two small avicu- 

 laria are borne on this border, one on each side about one-third of the 

 way from the distal end; their rounded mandibles face upward and 



