NO. 1 OSBURN: EASTERN PACIFIC BRYOZOA — CHEILOSTOMATA 157 



of avicularia are usually present, those on the outer zooecial wall being 

 much larger than those on inner zooecia below or just above a bifurca- 

 tion, and occasionally nearly all of them are small. 



Robertson records the species from Monterey Bay north to Dillon 

 Beach, California. O'Donoghue lists it from a number of localities in 

 British Columbia, which would appear to be the northern limit of dis- 

 tribution. Marcus found it in Bahia de Santos, Brazil. 



Hancock Stations: 17-34, Stephens Bay, Chatham Island, Galapagos, 

 32 fms; 1067-40, off Consag Rock, Gulf of California, shore; 1410-41, 

 3 miles east of South Point, Santa Rosa Island, California, 17 to 20 fms. 

 The writer has also collected it in Newport Harbor, California, on the 

 piles of docks. Very abundant in Miss Blagg's collection from the vicinity 

 of Monterey Bay, California. It appears to have a wide range along the 

 Pacific coast, from British Columbia to the Galapagos Islands, and the 

 record by Marcus from Brazil extends its range to the Atlantic. 



Bugula flabellata (J. V. Thompson), 1847 



Bugula flabellata, Robertson, 1905:270. (Not 1900:321, see B. pugeti). 



Zoarium consisting of flabellate branches of varying width, usually 

 3 to 6 series of zooecia, the larger branches arising near the short base 

 and more or less whorled. The zooecia are elongate, the membranous 

 area occupying the whole front ; the lateral margins are free from spines, 

 but there are 2 to 4 on the distal end, the proximal ones often curved 

 somewhat across the aperture. Avicularia on the marginal zooecia only, 

 attached above the middle of the zooecial length, moderately large and 

 robust with a strongly decurved beak. 



Ovicell subglobose or somewhat hood-shaped, with broad, short base, 

 directly in line with the zooecial axis. 



This well-known species is definitely a Bugula in spite of the multi- 

 serial arrangement of the zooecia, as it lacks the special calcified dorsal 

 walls of Dcndrobeania, and the origin of the zooecium is long-forked, 

 the prongs extending well down the sides of the preceding zooecium. 



It is widely distributed over both shores of the Atlantic, southward 

 to the Cape of Good Hope and Brazil, but has been recorded only once 

 for the Pacific, where Robertson found it growing on piles in San Diego 

 Bay, California. 



Hancock Stations: 371-35 and 374-35, Viejas Island, Independencia 

 Bay, Peru, 5 to 12 fms. 



