Catalogue of Non-Calcareous Sponges. 237 



Reniera clathrata, n. sp. 



Sponge massive, spreading, irregular, somewhat clathrous and 

 throwing off short, irregular, slender, anastomosing branches. 

 Vents variable in size, mostly on monticular projections, either 

 on the main body or on the branches. Texture soft, resilient, 

 rather cavernous ; very tender and friable. Light brownish- 

 yellow in spirit. 



Skeleton, a close network of small oxea, with small polygonal 

 meshes commonly bounded by single spicules ; loose multispicular 

 primary lines may be distinguished in parts. 



Spicules, short, fairly stout, fairly gradually sharp-pointed, 

 slightly curved oxea, measuring about 0'083 by 0'005 mm. 



This species may possibly be identical with some of the many 

 llritish species described by Bowerbank under the name Isfldictya, 

 Imt I am not at present in a position to decide this question. 



R.N. 920 (s.lO); llSfx 



Reniera longinianus, n. sp. 



'? Chalina polychotoiua, pars.. Coll. Brit. Mus. 



Sponge compressed, thin, palmodigitate. Branches long, 

 slender, compressed in the same plane. Vents minute, numerous, 

 arranged in marginal rows. Surface smooth but minutely 

 granular. Texture compact, tirm, resilient, but easily breaking. 

 Pale yellow in spirit. 



Skeleton, a close, irregular network of small oxeote spicules, 

 with multispicular primary and mostly unispicular secondary 

 lines, but often very confused. 



Spicules, short, slightly curved, fairly gradually sharp-pointed 

 oxea, measuring about 0-083 by 0"005 mm. Except as regards 

 the very characteristic external form this species closely resembles 

 R. clathrata. 



R.N. 576 (x, 19 f; "cream buff'"); 609 (x, 20 f; "cream 

 buff.") 



? B.Af. d. 68 {'' Chalina polychotoiua;' Reg. 86-12-15-172). 



Reniera pro.xinia, n. sp. 



Flabellate to palmo-digitate with short stout branches ; may 

 be stipitate with bushy palmodigitate head. Vents minute, 

 numerous, scattered or marginal. Surface smooth. Texture 



