676 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Genus BIGRISIA d'Orbigny, 1853 

 Genotype, Crisidia edwardsiana d'Orbigny, 1839. 



Bicrisia edwardsiana (d'Orbigny), 1839. 

 Plate 71, fig. 2 



Crisidia edwardsiana d'Orbigny 1839:8. 

 Crisia cornuta, Robertson, 1900:328. 

 Crisia edwardsiana, Robertson, 1910:237. 

 Crisidia edwardsiana, O'Donoghue, 1926:18. 

 Bicrisia edwardsiana, Borg, 1926:260 and 351. 



The zoarium is usually bushy, much branched, reaching a height of 

 50 to 75 mm, the tips of the branches curved forward. The zooecia are 

 tubular, 0.50 to 0.70 mm long, somewhat arcuated, usually 3 to 5 to 

 an internode (basally 1 or 2). Jointed "spinous processes," 1.0 mm or 

 more in length, similar to those of Crisidia, are apparently vestigial 

 zooecia. 



The ovicell is somewhat elliptical in form and is free for nearly its 

 entire length ; a characteristic feature is the position of the ooeciostome 

 on the dorsal side near the distal end. 



Robertson evidently confused this species with Crisidia cornuta. Her 

 specimens with "Internodes consisting typically of a single zooecium" 

 must have been cornuta, while those of "two, three, four or five zooecia" 

 are undoubtedly edwardsiana. Her figure of the ovicell, 1910, plate 19, 

 fig. 10, is definitely edwardsiana. 



Robertson listed this species (and cornuta) from Alaska to San Diego, 

 California. O'Donoghue recorded it from the San Juan Islands, Puget 

 Sound. It appears to be more common than cornuta on the California 

 coast and extends farther southward. 



Hancock Stations: 1320-41 and 1370-41, off Santa Catalina Island, 

 shore to 18 fms; 1210, at La Jolla, shallow water; San Diego Jetty, 

 shore (Dr. H. R. Hill) ; Newport Harbor on floats (R. C. Osburn) ; 

 all from southern California. Also at 843-38, Lobos de Afuera Islands, 

 Peru, 6°53'50''S, 80°43'30''W, at 25 fms. This beautiful but incon- 

 spicuous little species is probably more common than the number of 

 stations indicates and possibly extends along the whole Pacific coast. 



Genus FILICRISIA d'Orbigny, 1853 

 Genotype, Crisia geniculata Milne-Edwards, 1838 



In younger stages of growth this genus resembles Bicrisia except for 

 the absence of the spinous processes, but older specimens are readily 



