NO. 1 OSBURN: eastern pacific BRYOZOA CHEILOSTOMATA 57 



Canu and Bassler named this species because of the striking brown 

 color of the spines in their specimens, but all gradations of color occur; 

 some colonies have pale brown spines, others have the brown only at the 

 base and others are pure white. The avicularia are always white and 

 glistening. The species was originally described from the Galapagos Is- 

 lands, Albatross Sta. D. 2815. 



Hancock Stations: 137-34, Clarion Island, west of Mexico; 155-34, 

 Albemarle Island, 167-34 and 451, Charles Island, 182-34 and 462, 

 James Island, Galapagos; 431-35, off Octavia Rocks, Colombia; 14 to 

 100 fms. Also, Gulf of Panama, Galtsoff collection, on pearl oysters. 



Gauloramphus cymbaeformis (Hincks), 1877 

 Plate 5, fig. 7 



Membranipora cymbaeformis Hincks, 1877 :99 ; 1888 :217. 

 Membranipora cymbaeformis, Osburn, 1912:230. 

 Callopora cymbaeformis, Oshurn, 1919:614; 1923 :8D. 

 Gauloramphus cymbaeformis, Osburn, 1932 :9. 



The zoarium encrusts the stems and fronds of Bryozoa, hydroids, etc., 

 especially on the dorsal side of Dendrobeania inurrayana (Johnston). 

 The zooecia are moderately large, up to 0.75 mm long, the walls high 

 and the mural rims well separated. The gymnocyst is variable, sometimes 

 one-third of the zooecial length but usually much shorter; cryptocyst 

 narrow, smooth or faintly granular; 4 to 6 spines on each side, tall and 

 slender (the distal ones may be 0.40 mm long), the proximal ones curved 

 more or less over the opesia, the distal ones directed forward. The avicu- 

 laria are tall, with a slender stalk which is graduated into the avicularian 

 body, rising among the spines but taking their origin just outside of the 

 row of spines. 



A common species on the Atlantic coast of North America from Cape 

 Cod, Massachusetts, to Greenland. Recorded from Icy Cape, Alaska 

 (Osburn, Canadian Arctic Expedition). 



Common at Point Barrow, Alaska, G. E. MacGinitie, collector, 

 Alaska Research Laboratory. 



