[lamhe] sponges from THE ATLANTIC COAST OF CANADA 189 



to have not more than three ehiws or teetli at the large end and three 

 minute teeth at the small end ; average length 002 mm. (2) Very large, 

 stout, sim])le signiata, with a maximum length of 0"10 mm. and about 

 0-006 mm. thick at the centre of the curve (I'late I., fig. 8d). (3) 

 Small, slender sigmata that appear to 1)C always contort and confined to 

 the enlarged distal ends of the branches ; average size 004 by 0003 mm. 

 (Plate I., tig. 8c). 



Locality. — Between Anticosti and the Gaspé peninsula, one si)eci- 

 men, preserved in alcohol, in 200 fathoms, deep sea mud, J. F. Whiteaves, 

 1873. 



Foreign distribution. — Coast of Norway (Sars), between the north 

 coast of Scotland and the Fa^roe Islands (Carter). 



Cladoriiiza aSToRDENSKioLDii. Fristedt. 

 (Plate I., figs. 9, 9a—/.) 



Cladorhiza Norden-ski'dldii, Fristedt. 18S7. Spong-es from the Atlantic and Arctic 



Oceans and- the Behring Sea (translation), Vega- 

 expeditionens vetenskapliga arbeten, p. 455, pi. 25, 

 figs. 56-59 and plate 31, fig. 25. 



A portion of a sponge, evidently the root, which agrees perfectly in 

 skeletal arrangement, as far as the specimen admits of comparison, and 

 in the shape and size of the spicules with Fristedt's specimen fro in the 

 east coast of (irreenland, was dredged by Mr. Whiteaves between Anti- 

 costi and the Gaspé peninsula (Plate I., fig. 9). 



Fristedt's specimen is described as consisting " of a stem, 225 mm. 

 in length, the greatest thickness being 5 mm., the smallest 2 mm., and 

 of branches, which are very minute, not exceeding 5 mm. and placed 

 laterally, the upper part of the sponge being compressed. The lower 

 part is expanded and attached to a hard object. The sj^onge has not, as 

 the other Cladorhizœ (Wyv. Thomp.) roots." Judging from Fristedt's 

 figui"e of his specimen, the lower part of the sponge looks as if it had 

 been broken across, nor is any decided basal expansion shown. 



The upper portion of the sponge is wanting in Mr. Whiteaves's 

 specimen. The sponge has been broken at the lower part of Avhat was 

 evidently- the stem.. The upright stem, at its base, suddenly bends at 

 right angles, forming a horizontal continuation, from which proceed four 

 vertically downward directed roots, about 25 mm. long and from 2 to 5 

 mm. thick, two of which have been broken off. The thickness of the 

 stem is nearl}" 3 mm. 



Spicules. — (a) Mega&clera ; (1) Stout styli, often considerably bent 

 at the middle, thickest at midlength, obtusely but sharply pointed at one 

 end and narrowly rounded at the other; from 0-5'75 to O-TSO mm. long 

 (Fristedt, 9 — 1 mm. long), forming the axis of the sponge (Plate I., 



