484 Messrs. S. O. Ridley and A. Dendy on 



yellow. Firm, tough, flexible, elastic. Surface minutely 

 conulose and strongly hispid. Axis a dense reticulation of 

 acerate spicules imbedded in spongin. Spicules: — (1) ace- 

 rates, abruptly sharp-pointed, size -23 by '01 8 millim. ; (2) 

 long smooth acuates projecting from surface, size 5'2 by '037 

 millim, ; (3) smooth slender acuates in whorls around the 

 last named, size "52 by '0075 millim. ; in the rind long^ 

 slender spicules, acerate to cylindrical, of about the same size ; 



(4) trichite-bundles '0126 millim. long. 



Locality. Station 208, Philippine Islands, 18 fath. 



Thrinacopliorafu.niformis^ n. sp. 



Cylindrical, elongated, may be branched; flexible, rope- 

 like. Dirty yellow. Surface beset with prominent conuli. 

 Skeleton a dense axis of spied o-fil)re from which fibres radiate 

 to the surface. Spicules : — (1) slender acuates, finely pointed, 

 size up to 1-8 by '025 millim. ; (2) slender acerates with 

 unequal ends, size up to Vl by "023 millim. ; (3) fusiform 

 acerates with equal ends, bent at centre, size up to 'G by -023 

 millim.; (4) crooked acuates with apex branched into irre- 

 gular short fangs, size -52 by '0063 millim., often in bundles; 



(5) trichite-bundles, size -1 by *01 millim. 

 Locality. Off B Jiia, shallow water. 



Suborder II. Clavulina (Vosmaer) . 



Typically corticate, skeleton typically radiate ; skeleton- 

 spicules almost ahvays spinulate. Flesh-spicules may be 

 present, but never anchorates. 



Family 1. Suberitidse. 



Without flesh-spicules. 



Genus SUBEEITES (Nardo). 



Skeleton-spicules spinulate or subspinulate, with smaller 

 spicules of the same form radiately arranged at the surface. 

 Surface without mammiform projections. 



Suherites caminatus^ n. sp. 



Sessile, hemispherical ; diameter about | inch ; with one or 

 more usually chimney-like oscula at the summit ; often for- 

 ming colonies by lateral budding. Cortex dense, well defined, 

 and packed with outwardly projecting spicules. Main skele- 

 ton of separate radiating fibres. Spicules smooth, spinulate, 



