Catalogue of Non-Calcareous Sponges. 41 



B.M. ? (1. 49 {'' Holopsamina la/nimefavosa" Reg. 86-12-15- 

 420); d. 54 i^' Holopsamiua lamimefavosa" unregistered); d. 55 

 {'^ Holoposatnma liniincefavosa^'' Reg. 86-12-15-491); d. 56 

 {"■ Holopsainma lamina\ Reg. 86-12-15-490); d. 58 {Holop- 

 samma lamina" Reg. 86-12-15-312). 



Genus Flianohaliciiondria., Carter. 



Skeleton arranged in plumose columns. Megascleres smooth 

 (liactinal and spined monactinal. Typical microscleres isochelse. 



Phi inohalichondria cwspitosa, Carter, sp. 



Ecliinonenia acspitosa. Carter, A.M.N.H., November, 1885, 

 p. 352. 



The massive, proliferous, coralloid external form and columnar 

 structure with the plumose skeleton columns are very charac- 

 teristic of this species. 



R.N. 485 (s. 10, 8 f; "salmon colour"); 565 (s. 10, 8 f; 

 *' orange"); 664; 901 (s. 10). 



B.M. sp. 45 {'■'■Ecliinonenia C(Cspitosa, C' type," Reg. 86-12-15- 

 97). 



Piiiniohalichondria iincifer, n. sp. 



Sponge thin, encrusting, with minutely conulose surface and 

 columnar structure. Colour in spirit pale yellow. 



Skeleton composed of short, stout, plumose columns, running 

 from the base to the dermal membrane and branching slightly in 

 their course. These columns consist chiefly of spined styli, whose 

 l)asal portions are connected together by much spongin ; accom- 

 panied by a few slender oxea. The oxea become inore abundant 

 towards the surface, radiating off from the plumose columns in 

 tufts to the dermal membrane. 



Megascleres, (a) long, straight, slender oxea ; smooth and 

 rather abruptly pointed ; measuring about 0*16 by 0-0027 mm.; 

 (d) spined styli ; rather slender, straight or slightly curved, 

 tapering very gradually to the apex, the neighbourhood of which 

 alone is free from spines; varying much in size, about 048 by 

 0*0083 mm. when fully grown. 



