6 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 1 1 



100 /x in diameter. Accessory or transverse fibers 1 /i, to 25 ju, in diameter, 

 often uncommon, usually free from inclusions. The flagellate chambers 

 are conspicuous, crowded together, and about 45 )u, to 55 /x in diameter." 

 (de Laubenfels, 1932, p. 123.) 



Holotype. — U.S.N.M. 



Type locality. — "Long Wharf," Santa Monica, California. 



Distribution. — Reported from Carmel, California, to the Gulf of 

 California. 



Material examined. — 

 Sta. 720-37 Rocky Point, Sonora, Mexico 3-24-37 12 m 



Remarks. — The material examined agrees very closely with the south- 

 ern California material, although the flagellate chambers are, on the 

 average, somewhat larger and the mesh somewhat smaller in the Gulf 

 specimens than is typical of specimens from southern California. In the 

 latter respect the Gulf specimens are even closer to Dysidea fragilis of 

 the West Indies than are the California specimens, indicating, perhaps, 

 that the West Coast sponge may have evolved from the West Indies and 

 that the differences became more marked as it spread north. 



Order HaPLOSGLERINA Topsent 



Family Haliclonidae de Laubenfels 



Genus HALIGLONA Grant 



Haliclona cinerea (Grant) 



Plate 5, Figs. 9, 10 



Spongia cinerea Grant, 1827, p. 204. 

 Halichondria cinerea Fleming, 1828, p. 521. 

 Isodictya cinerea Bowerbank, 1866, p. 274. 

 Reniera cinerea Schmidt, 1870, p. 77. 

 Haliclona cinerea de Laubenfels, 1932, p. 120. 



Diagnosis. — This is an encrusting form, drab in alcohol, and about 

 6 X 2 X 4 cm thick. Oscules are conspicuous over the surface and average 

 4 mm in diameter. The surface is very irregular with many porelike 

 depressions. The endosome has vague tracts of spicules forming an irregu- 

 lar reticulation. The sole type of spicule is an oxea. Typical specimens 

 from the Gulf of California show the following spicule measurements: 



Specimen 1 — 5 x 1 15 /x 



Specimen 2 — 6 x 140 /a 



Specimen 3 — 4 x 190 /x 



Holotype. — Probably in the British Museum of Natural History. 



Type locality. — Europe. 



