NO. 2247. SPONGES FROM NORTHWESTERN PACIFIC— EOZAWA. 551 



Tubar triradiates {b) sagittal. Rays equally thick, moderately 

 variable in size and shape. Basal ray nearly straight, tapering to 

 sharp point. Paired rays nearly equal, simply slightly curved for- 

 ward or doubly curved, first forward and then backward, ending 

 in sharp point. Those tubar triradiates which lie directly beneath 

 the gastral cortex have more widely diverging paired rays than the 

 others. Basal ray 270-520/i, and paired rays 170-230/* long; both 

 20-24ju, thick at base. 



Gastral triradiates (c) sagittal, with slender rays lying all in the 

 same plane. Basal ray longer than paired rays, straight, 240--i00ju, 

 long and 20/a thick at base. Paired rays sharply pointed, showing 

 more or less distinct double curvature, being curved forward at 

 basal parts and backward in the remaining parts, 190-300/x long and 

 20/x thick at base. 



Triradiates of oscular margin (e) strongly sagittal. Basal ray 

 usually much longer and thinner than paired rays, straight, sharply 

 pointed at end, 180-570/* long and 12/* thick at base. Paired rays 

 equal, more or less sharply pointed, very strongly diverging, stand- 

 ing out almost at right angles from basal ray, llO-220/i long and 

 16/* thick at base. 



Large oxea of body surface and oscular margin (d) straight or 

 slightly curved, sharply pointed at both ends, attaining a length 

 of over 1 mm. and a thickness of 20-40/* in the middle. 



Linear spicules very slender, straight, sharply pointed at both 

 ends. Those of general body surface 370/* to 1 mm. long and 5-10/i 

 thick; same of oscular margin (/) 1.4 mm. or more long and 4-20/* 

 thick. 



Locality. — Off Cape Eollin, Simushir Island, Kuriles (Station 

 4803, 229 fathoms). 



Remarks. — This species seems to be nearly related to both Leu- 

 candra anguinea (Ridley^) and L. pulvinar (HaeckeP), but is 

 readily distinguished from either by its external form and by the 

 dimensions and other details of most of the spicules. 



12. LEUCANDRA SPLENDENS, new species. 



Plate 85, figs. 12-14. 



Three specimens of this new species exist in the collection. One 

 of them (pi. 85, fig. 12), which came from Station 4790, was selected 

 as the type of the species (Cat. No. 9178, U.S.N.M.). It is of an 

 ovoid shape, measuring 22 mm. in length and 11 mm. in greatest 

 breadth. The outer surface is strongly hispid, owing to the presence 

 of large oxea projecting from it. The osculum at the upper end is 

 circular, provided with a well developed fringe of about 3^ mm. 



'^Leucortis anguinea Ridley, Sponglda. Reports on the Zoological Collections made in 

 tbe Indo-Paciflc Ocean during the Voyage of H. M. S. Alert, 1881-1882, pp. 629, 630, 

 pi. 53, fig. L ; pi. 54, figs, d, d'. 



- Leucortis pluvinar Haeckel, Kalkschwiimme, 1872, pp. 162-166, pi. 29. 



