NO. 1 DICKINSON : SPONGES OF GULF OF CALIFORNIA 5 



Remarks. — This sponge does not differ materially from published 

 descriptions of the holotype. 



Genus VERONGIA Bowerbank 



Verongia thiona de Laubenfels 



Plate 3, Fig. 6 



Verongia thiona de Laubenfels, 1930, p. 28. 



Diagnosis. — Verongia is an incrustation, spongy and yellow in life, 

 turning blue or purple on drying. The fibers, which are laminate, are 

 clear yellow. "Histological details: The flagellate chambers are spher- 

 oidal, 25 jx in diameter. Principal fibers 80 to 150 /x in diameter, cored by 

 the usual pith as found in this genus. Pith of the fibers, 50 yit to 100 /x, in 

 diameter." (de Laubenfels 1932, p. 124.) 



Holotype. — U.S.N.M. 



Type locality. — Laguna Beach, California. 



Distribution. — Southern California to the Gulf of California. 



Material examined. — 

 Sta. 554-36 Angel de la Guardia Island 3- 8-36 20 m 



Sta. 633-37 Espiritu Santo Island 3- 6-37 36 m 



Sta. 1040-40 GuaymasBay 1-23-40 Shore 



Sta. 1073-40 Rocky Point, Sonora 2-3-40 20 m 



Remarks. — The specimens agree closely with the type specimen de- 

 scribed from Laguna, although in the Gulf specimen the principal fibers 

 are somewhat smaller ( 100 /i maximum, and the pith only 30 to 60 /a) . 



Family Dysideidae Gray 



Genus DYSIDEA Johnston 



Dysidea amblia de Laubenfels 



Plate 4, Figs. 7, 8 



Duseideia amblia de Laubenfels, 1930, p. 28. 

 Dysidea amblia de Laubenfels, 1932, p. 123. 



Diagnosis. — "Shape, digitate somewhat ramose. Size, up to 20 or 30 

 cm in height, about 1 cm in diameter. Consistency spongy. Color, in 

 alcohol, drab. Oscules, inconspicuous, barely 100 /x, in diameter. Pores, 

 not evident. Surface, superficially conulose with conules usually less than 

 1mm high and less than 1 mm apart. 



"Ectosomal specialization, a veiy thin dermis, not detachable. Endo- 

 somal structure, a fibrous reticulation with meshes about 250 /* in 

 diameter. Principal or ascending fibers, 100 fi to 200 fx. in diameter. Cored, 

 sometimes superabundantly, by scattered sand grains often more than 



