118 LAWEENCE M. LAMBE ON 



A number of sponges represent this species in the collection ; some are preserved in 

 alcohol, others are dry. 



Most of the specimens have an uneven, irregularly tuberculate surface or as is found in a 

 few cases the tubercles are somewhat prolonged and pointed, differing thus from the type 

 specimen from Elk Bay, Discovery Passage, Vancouver Island, which had a rather even 

 surface. In all cases the pores are found to be dispersed as in the type specimen. 



The styli (Plate IL, fig. 5) vary in length from 0-315 to 0"369 mm. with an average 

 thickness of 0'013 mm. 



The anisochelœ (Plate II., tigs. 5a, 5b) have an average length of 0-072 mm. 



The sigmata (Plate II., fig. 5d), simple and contort, are about 0*058 mm. long. 



The small anisochelœ (Plate II., fig. 5c) are also present ; they varj^ in length from 0'019 

 to 0-032 mm. 



Numerous trichodragmata (Plate IL, figs. 5e, 5f ) loose and in bundles, occur in the 

 Alaskan specimens ; on account of their scarcity in the specimen from Vancouver Island, the 

 type of the species, their presence was overlooked and no mention is made of them in the 

 original description. The trichodragmata are 0-032 mm. in length. 



Distribution. — Behring Sea and jî^orth Pacific Ocean. 



ESPBRELLA MODESTA. (Sp. nOV.) 



(Plate III., figs. 1, la— d.) 



Sponge slightly lobed ; found growing on sea-weeds, stones, &c. Colour, when dry, 

 light brownish-yellow. Texture, moderately firm, not elastic. Surface, even, somewhat 

 rough. Oscula, circular openings, level with the general surface, about 1-5 mm. in diameter. 



Skeleton. — Irregular, with an indistinct reticulate arrangement of stylote spicules. 

 Loose, rather slender fibres of spicules pass to the surface and are connected together by 

 spicules which show very little tendency to form definite fibres but which are loosely and 

 irregularly disposed. There is seemingly no distinct dermal arrangement of the skeleton. 

 A rather large proportion of spongin is present. 



Spicules. — (a) llegasclera, of two sizes. (1) Stout, rather abruptly pointed, strongly 

 bent, smooth styli (Plate III., fig. 1) ; average size 0-183 by 0-009 mm. (2) Slender, grad- 

 ually and sharply pointed, strongly bent, smooth styli (Plate III., fig. la) ; length varying 

 from 0-124 to 0-150 mm., average thickness 0-003 mm. (b) Microsclera ; small palmate 

 anisochelse (Plate III., figs. Ib-d,) varying from 0-019 to 0-026 mm. in length ; occurring in 

 moderate numbers. 



Distribution. — Behring Sea and North Pacific Ocean. 



EsPERiopsis QuATSiNOENSis, Lambe. 



(Plate IL, figs. 6, 6a.) 



Esperiopda Quatdnoengis, Lambe. 1892. Trans. Royal Soc. Canada, vol. x., pp. 69, 76, pi. iii., figs. 8, 9 ; pi. iv., fig. 

 7 ; pi. v., figs. 8, 8a, 8b, 8c ; pi. vi., fig. 4, and vol. xi., p. 29. 



The specimens originally described varied in shape from irregularly subflabellate to 

 subramose but the numerous additional specimens, now before me, numbering in all about 

 one hundred and fifty, show that the sponge is frequently funnel or cup-shaped with num- 

 erous intermediate varieties between these and the typical forms which are also abundantly 

 represented. 



Distribution. — Behring Sea, North Pacific Ocean as far south as the State of Washington. 



