44 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.11 



Remarks. — This sponge is not very different from G. mesotriaena, 

 described above; and, although it answers the description of G. japonica 

 much more closely, it may be only an atypical specimen of G. mesotriaena. 



Genus GEODINELLA (Gray) 



Geodinella Isabella, new species 



Plate 85, Fig. 169 



Diagnosis. — This sponge is encrusting and massive. Its size is 3 cm 

 by 6 cm by 6 cm. The consistency is leathery, and the color of the pre- 

 served specimen in dark drab. The surface is definitely hispid, although 

 microscopically so. There is a distinct cortex 1 mm thick, which is not 

 detachable. 



The cortex is largely a sterraster armor. The sterrasters are 30 /a in 

 diameter. Two sizes of oxeas are present. The first of these is most often 

 about 15 [X by 550 /x. The second has an average size of 3 /x by 100 fi. 

 These two types do not represent the ends of a continuous series, as 

 spicules of intermediate size are not present. The tylostyles typical of the 

 genus are the same size as the smaller oxeas. Oxyspherasters are abundant 

 subdermally. These are 30 ft in diameter. There are also very abundantly 

 what appear to be oxyspherasters only 5 ju, in diameter. 



Holotype. — AHF no. 24. 



Type locality. — Isabel Island, Sinaloa, Mexico; pontes coral; 4 m. 



Distribution. — Same. 



Material examined. — 

 Sta. 125-33 Isabel Island 3-19-33 4 m 



Remarks. — Geodinella robusta Lendenfeld, reported from various 

 Albatross stations of California to southern Alaska, may be a near relative 

 of this sponge. It does not have the two size ranges of oxeas, however, 

 and the asters are much larger. 



Family Graniellidae de Laubenfels 



Genus CRANIELLA Schmidt 



Craniella arb (de Laubenfels) 



Plate 85, Fig. 170 ; Plate 86, Figs. 171, 172 ; Plate 87, Fig. 173 



Tetilla arb de Laubenfels, 1930, p. 26. 

 Craniella arb de Laubenfels, 1935, p. 12. 



Diagnosis. — This is a spherical to subspherical sponge with a pro- 

 nounced radiate structure, pronouncedly hispid, with a dense cortical area 

 about 1 mm thick. Occasional oscules are found. 



