NO. 1 OSB URN : EASTERN PACIFIC BRYOZOA — CHEILOSTOMATA 137 



Recorded by Robertson from San Diego to San Francisco, California, 

 and by O'Donoghue from a number of places in southern British Co- 

 lumbia. 



Hancock Stations : Dredged at 11 stations among the islands off south- 

 ern California; at 6 stations off the west coast of Mexico, Natividad 

 Island, San Benito Island, Thurloe Head, Cedros Island and Tenaca- 

 tita Bay; in the Gulf of California as far north as Angel de la Guardia 

 Island (Isla Partita) ; rather surprisingly it occurred again at Station 

 885-38, Gorgona Island, Colombia. It is very abundant along the shores 

 of southern California on floats and the piles of docks. 



/>i^ Scrupocellaria ferox Busk, 1852 

 Plates 18, fig. 11, and 19, fig. 4 



Scrupocellaria ferox Busk, 1852:370. 

 Scrupocellaria cyclostomata, Kirkpatrick, 1890:16. 

 Scrupocellaria ferox j Waters, 1913 :476. 

 Scrupocellaria ferox, Harmer, 1926:367. 



The species is especially distinguished by the very large avicularium 

 which broadens outward below the opesia and partly covers its proximal 

 area; the rostrum is directed outward, curved and asymmetrical; the 

 mandible very acute. The lateral avicularia are so small as to be almost 

 vestigial. There is no scutum. Busk figured the species without distal 

 spines, but Harmer indicated that there may be four vestigial spines ; the 

 present material shows the bases of two small spines, one outer and one 

 inner. The vibracula are visible from the front, the groove slightly 

 diagonal. Setae were wanting on our specimens, but Harmer states that 

 they are much longer than the zooecium and curved at the tip. No ovi- 

 cells on our material, but Harmer indicates that they are large with pores 

 which are not tubular. 



Busk had the species from the Louisiade Archipelago ; Waters from 

 Zanzibar; Kirkpatrick from the Tizard Bank, China Sea, and Harmer 

 from numerous Siboga stations about the East Indies. 



Hancock Stations: 435, Wreck Bay, Chatham Island Galapagos Is- 

 lands, 22 fms. two internodes, dead; 450, Galapagos, 0°55'00''S, 90° 

 30'00"W, 60 fms, living; and 461, Tagus Cove, Albemarle Island, Ga- 

 lapagos, 80 fms. It is apparently a tropical species widely distributed in 

 the Indian and Pacific Oceans. 



