76 LAWRENCE M. LAMBE ON SOME 



ramose branchlets or expausions vary iu diameter from 5 mm. to 14 mm. Colour when 

 dry, light yellowish-brown verging into a dull criinson lake. Texture fragile, brittle. 

 Surjace slightly rough to the touch. Osctila circular, each at the summit of a brauchlet 

 and with an average diameter of 2 mm. Examined when dry. 



Skeleton. — (Plate V, fig. 12.) Renierid in arrangement, viz. : a uniserial, moderately 

 regular reticulation. 



Spicules. — (Plate V, fig. 12a) small, stout, rather sharply pointed, slightly curved, 

 smooth oxea; average size 0144 by 0013 mm. 



Loca/%.— Petropaulowski, Kamtschatka, lat. 60° 30' N., long. 172' 30' W. 



ESPERIOPSIS QUATSINOENSIS. 



(Plate IV, fig. T and Plate VI, fig. 4). 



Locality. — Checkagoff" Harbour, Atka Island, Aleutian Islands, lat. 52' 20' N., long. 

 174° 80' W : one very symmetrical specimen of this sponge which has already been des- 

 cribed on p. 75. 



Phakellia papykacea, Eidley and Dendy, var. 



(Plate IV, fig. 8 and Plate VI, figs. 5, 5a). 



Phakellia papyracea, Ridley and Dendy. 1886. Ann. and Mag, Nat. Hist., ser. 5, vol. xviii., p. 478. 

 Phakelliapapyracea, Ridley and Dendy. 1887. Rep. Monaxonida, Zool Chall. Exp., vol. xx., p. 172, pi. xxxvi-, 

 fig. 4. 



Sponge (Plate IV, tig. 8) cup-shaped, stipitate with a well developed stalk, the 

 specimen figured having a height of 105 mm., the cup itself being 55 mm. high with a 

 diameter of 60 mm. The thickness of the wall of the cup varies from about 8 ram. near 

 the base to 4 mm. near the thin upper margin. Colour when dry, yellowish or brownish- 

 white. Texture firm. Surface slightly rough to the touch, alike on the outside and inside 

 of the cup. Oscula distinct, uvimerous, on both surfaces. Examined when dry. 



Skeleton. — (a) Main ; irregularly reticulate, open. The primary fibres, strong, distinct 

 with secondary fibres crossing them iu a loose and irregular manner, (b) Dermal ; 

 dense, composed of indistinct brushes of small stylote spicules. 



Spicules. — iJfeg-ast^era ; of two kinds. (1) Large, stout, slightly curved, smooth stj'li, 

 rather sharply pointed (Plate VI, fig. 5) ; size about 0412 by O'OIS mm. (2) Small, 

 moderately curved, sharp pointed, smooth styli (Plate VI, fig. 5a) ; size 0176 by 0009 

 mm. 



This sponge is represented in the collection by three well preserved specimens which 

 agree fairly well with the description of Phakellia papyracea, Eidley and Dendy, and may 

 be considered as a variety of that species, especially if that sponge should eventually 

 prove to be cup-shaped. The wall of the cup, however, is much thicker than in Phakellia 

 papyracea, Ridley and Dendy, and the spicules are much smaller. 



Locality.— St. Matthew Island, lat. 60' 30' N., long. 172° 30' W. 



