680 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Gabb and Horn described the species from the Pleistocene of Santa 

 Barbara, California, overlooking d'Orbigny's previous use of serrata; 

 Canu and Bassler listed it from the Pleistocene of Santa Barbara and 

 Santa Monica, and the writer has found it in the Pleistocene of San 

 Pedro and Newport Harbor, California. Robertson described pacifica 

 from the "San Diego region only." O'Donoghue recorded it from numer- 

 ous British Columbia localities, and it is a common species all along the 

 coast from British Columbia southward to Cedros Island (28°N), 

 and less commonly to the Galapagos Islands. 



Hancock Stations: Dredged at more than 30 stations and taken at 

 numerous shore stations, most abundant about the island region off 

 southern California. Galapagos Islands, 5 stations: 152-34, Albemarle 

 Island, shallow water; 170-34, Chatham Island, 32 fms; 193-34 and 

 198-34, Charles Island, 10-65 fms, and 804-38, Onslow Island. Also 

 at 1051-40, Angel de la Guardia Island, Gulf of California, 21 fms. 



Grisia occidentalis Trask, 1857 

 Plate 71, figs. 3, 4, and 5 



Crista ccidentalis Trask, 1857:113. 



Crista eburnea, Robertson, 1903:116. 



Crista occidentalis, Robertson, 1910:239. 



Crisia occidentalis, O'Donoghue, 1923:7; 1926:18. 



Zoaria forming dense tufts reaching a height of 25 mm, the tips of 

 the branches often inflected, especially in ovigerous colonies. The inter- 

 nodes consist of 3 to 5 zooecia near the base, the more terminal ones 

 from 7 to 12; joints white to yellow; basis rami not wedged in between 

 the zooecia but extending along the outer side of its mother zooecium, 

 though there is some variation in this respect. The frontal surface of 

 the internode is slightly keeled and the distance between zooecial aper- 

 tures is about equal to the width of the branch. The zooecia are connate 

 for their entire length, the tips directed forward; frequently there is a 

 short point back of the dorsal lip of the tube, and the tips of the terminal 

 branches often end in spinous points. 



The ovicell is moderately large, elongate pyriform, inclined in the 

 axis of the internode ; the ooeciostome is situated a little back of the 

 summit of the ovicell, with a short, straight or slightly curved tube, the 

 circular aperture opening more or less upward. 



One might conclude from Robertson's discussion that ovigerous 

 colonies have only inflected branches and that only the male colonies 

 have the terminal spinous points. This is not the case, however, as 



