34 ROYAL SOCIETY OF CANADA 
Locality—Davis Strait, Exeter Harbour, 10 fathoms, stony bottom, 
A. M. Rodger, 9th of September, 1892, two specimens. 
LEUCANDRA CUMBERLANDENSIS. (Sp. nov.) 
(Plate V, figs. 12, 12a-7.) 
Sponge solitary, upright, tubular, attached by the base, narrowing 
slightly above where it terminates in a single osculum surrounded by a 
short fringe. Surface hispid. The dimensions of the largest specimen 
are:—length 16 mm., maximum breadth 3 mm., length of oscular fringe 
about 2 mm., wall ‘? mm. thick inclosing a moderately wide gastral 
cavity. 
Skeleton—Composed of gastral quadriradiates, subgastral triradi- 
ates, triradiates and quadriradiates of the parenchyma, dermal triradi- 
ates, oxea and linear spicules at right angles to the surface and oxea of 
the peristome. 
1. Gastral quadriradates—Facial rays longer than the apical ray, 
generally curved slightly inward, sharply pointed, about ‘189 mm. long 
with a thickness at midlength of ‘006 mm.; apical ray, ending in a sharp 
point, about ‘137 mm. long. 
2. Subgastral triradiates—Sagittal; the three rays of the same dia- ~ 
meter and lying in the same plane; basal ray straight, averaging 373 
mm. in length and ‘01 mm. in thickness; lateral rays widely spreading 
with a graceful curve, ‘203 mm. long. 
3. Triradiates of the parenchyma.—Sagittal, of large size; all the 
rays of the same thickness and sharply pointed; basal ray straight, about 
°366 mm. in length and ‘013 mm. thick at midlength; lateral rays curved 
toward the basal ray, ‘255 mm. long; oral angle 125°. 
4. Quadriradiates of the parenchyma.—Sagittal with a long basal 
ray directed toward the dermal surface, with poorly developed lateral 
rays and a very short or scarcely developed apical ray; basal ray straight, 
sharply pointed, up to ‘360 mm. in length and ‘009 mm. in diameter. 
5. Dermal triradiates—Slightly sagittal or nearly regular, of large 
average size, in three or four layers at the surface; length of rays about 
‘242 mm. with a thickness at midlength of ‘013 mm. A few spicules of 
smaller size also occur thinly scattered among the larger ones; the rays 
of the smaller kind average ‘089 mm. in length with a thickness of 
‘006 mm. 
6. Large oxea.—At right angles to the surface, with the proximal 
end deep in the wall; sharply pointed, nearly or quite straight, reaching 
a length of 1:2 mm. with a diameter of ‘019 mm. 

