534 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54. 



Gastral triradiates (d) strongly sagittal, slender-rayed. Basal 

 ray much longer than paired rays, straight, perceptibly narrowed in 

 the middle parts, ending in sharp point, 560-730^/. long and 8-12[j. 

 thick at base. Paired rays equal or but slightly differentiated in 

 length, gradually tapering, showing more or less distinct double 

 curvature, 180-240tJ. long and 8-12[ji. thick at base. 



Gastral quadriradiates {e) similar to gastral triradiates, differing 

 only in the presence of apical ray. Apical ray {e') very strong, 

 variable in length, slightly curved upwards, strongly laterally com- 

 pressed, irregular in outline, narrow at base and broadening dis- 

 tally to terminate with obtuse end, 260-470[jl in length, 16ij, in breadth, 

 and up to 25[}. in thickness. 



Dermal oxea (/) elongate spindle-shaped, usually slightly curved, 

 rather irregular in outline, more or less sharply pointed at ends, 

 470-700iJL long and 12-16tJi. thick in the middle. 



Linear spicules of dermal cortex very slender, hair-like, straight, 

 sharply pointed at both ends, may measure 240[i, long and l[i. thick. 



Triradiates of oscular margin {g) strongly sagittal. All rays 

 nearly equally thick, gradually tapering. Basal ray straight, very 

 finely pointed, 150-300/;r, long and 10-12;^ thick at base. Paired 

 rays strongly diverging, sharply pointed, slightly curved backwards 

 in basal parts and either straight or slightly curved forewards in 

 the remaining parts, 100-150/* long and 10-12/x thick at base. 



Quadriradiates of oscular margin (A) like the triradiates of oscu- 

 lar margin except in the presence of apical ray. Apical ray much 

 shorter than either basal or paired rays, slightly curved and very 

 sharply pointed, directed upwards. 



Oxea of oscular margin {i) slender, slightly curved, broadest 

 nearer one end than the other, sharply pointed at both ends, 150- 

 230m long and 4ju, thick. 



Linear spicules of oscular margin similar to those of dermal 

 cortex. 



Localities.— OS Cape Tonin, Saghalin (Station 5017, 64 fathoms). 

 Cat. No. 9186, U.S.N.M., type and paratype; off Cape Patience, 

 Saghalin (Station 5024, 67 fathoms), two specimens. Cat. No. 9087, 

 U.S.N.M. 



Remarks. — This species is remarkable for the presence of some 

 intermediate layers of triradiates, indicative of the articulate tubar 

 skeleton, between the centripetally and centrifugally directed basal 

 rays of subdermal and subgastral triradiates. 



5. GRANTIA NIPPONICA, new species. 



Plate 84, fig. 8. 



This new species is represented in the collection by three speci- 

 mens. The sponge represents a solitary person of a slightly laterally 



