[LAMBE] SPONGES FROM COAST OF NORTHEASTERN CANADA 23 
ESPERELLA MINUTA. (Sp. nov.) 
(Plate I, figs. 3, 3a-c.) 
Sponge small, stipitate, consisting of a laterally compressed head 
borne on a slender stalk. In the single specimen representing this 
species, the stalk, which measures about 10 mm. in length and :3 mm. 
in diameter, adheres firmly, by its slightly expanded basal extremity, to 
a grain of sand; the head is about 3°5 mm. high, 2°75 mm. broad and 
about 1 mm. thick in the direction of its compression. The head does 
not seem to be abnormally flattened. No osculum has been observed. 
Skeleton.—Composed of upwardly directed spicules that have, in 
the head, a tendency to form loose strands, but that lie close to each 
other in the stalk in which a slight spiral twist is observable. Other 
spicules, in small numbers and of less size, occur at the surface, project- 
ing beyond it, those of the head being inclined slightly upward whilst 
in the stalk they project at right angles to the surface. 
Spicules—(a) Megasclera; of two kinds. (1) Large, smooth, 
gradually and sharply pointed styli that occasionally show a tendency 
to become tylostylote; composing the principal part of the skeleton ; 
varying from about ‘327 to °543 mm. in length and from ‘006 to ‘008 
mm. in thickness. (2) Small, smooth, sharply pointed, tylostyh, varying 
in length from ‘196 to ‘294 mm. with a thickness of from ‘005 to ‘006 
mm.; confined to the surface beyond which they project with their 
pointed ends outward; this form of spicule is not always clearly distin- 
guishable from some of the smaller styli but its position in the skeleton 
is distinct and definite. (b) Microsclera; of one kind, viz., small, palmate 
anisochelæ, verying in length from :018 to ‘019 mm., abundant through- 
out the sponge and at the surface. 
Locality.—Davis Strait, off Cape Wild, bearing N.E., 10 miles, in 
200 fathoms, A. M. Rodger, 4th of July, 1892. 
TOPHON CHELIFER, Ridley and Dendy. 
Iophon chelifer, Ridley and Dendy. 1886. Ann. and Mag. Nat. Hist., series 5, 
vol. xviii., p. 349. ; 
3 + Ridley and Dendy. 1887. Rep. Monaxonida, Zool. Chall. 
Hxpsnvole xx Da tlo) pl. xvi, fie. 3, andeple xvii. ness ae 
3, 8. 
“ rf Lambe. 1893. Sponges from the Pacific coast of Canada, 
Trans. Royal Soc. Canada, vol. xi., p. 30, pl. ii., figs. 7, Ta-f. 
oe sa Lambe. 1896. Sponges from the Atlantic coast of Canada, 
Trans. Royal Soc. Canada, second series, vol. ii., p. 191. 
This sponge has been already recorded as occurring in Canadian 
waters, both in the Pacific and Atlantic oceans, so that it is only 
