the ^Challenger ' 3fonaxomda. 483 



quite straight, smooth, gradually sharp-pointed acuates ; size 

 in surface-tufts '3 hy "0032 millim., in deeper parts "45 by 

 •009 millim. 



Locality. Simon's Bay, Cape of Good Hope, 10-20 fath. 



RaspaiUa ? rig Ida ^ n. sp. 



Erect, straight (single specimen with one incipient branch). 

 Maximum diameter ^inch. Yellowish grey. Tough, subrigid. 

 Hispid. Skeleton a dense central axis of closely-packed 

 spicules, from which rather sparse bands radiate to the sur- 

 face, ending in great divergent brushes. Little or no spongin. 

 Spicules, straight smooth spinulates or subspinulates, finely 

 pointed ; size variable, up to 2*0 by '025 millim., usually 

 smaller, especially in the dermal brushes. 



Locality. Station 142, Agulhas Bank, Cape of Good Hope, 

 150 fath. 



Genus Dendropsis *, n. g. 



Skeleton-arrangement i?a52?a^7^a-like. Skeleton-spicules 

 acuate of various forms. Flesh-spicules minute spined acerates. 



Dendropsis hidentifera^ n. sp. 



Erect, stipitate, dichotomously branched, branches flattened ; 

 all approximately in one plane. Greyish yellow. Tough, 

 hard ; minutely conulose and hispid. Skeleton an axial 

 core of close-packed spicules, from which much larger spicules 

 radiate to the surface in loose bundles surrounded by dense 

 sheaves of the " bidentate " acuates. Spicules : — (1) smooth, 

 gradually sharp-pointed acuates, fusiform, bent near the base, 

 size in axis "35 by '025 millim., in radiating tufts 1*1 by 

 •044 millim. ; (2) slender, smooth acuates, size up to 1*75 by 

 •019 millim., sometimes cylindrical ; (3) slender, straight, 

 hastately-pointed acuates, each with two sharp spikes pro- 

 jecting from the base, size '5Q by '0075 millim. ; (4) small 

 spined acerates, bent, size "09 by '0045 millim. 



Locality. Simon's Bay, Cape of Good Hope, 10-20 fath. 



Genus Theinacophoea (Ridley). 



Long, cylindrical, axiate. Skeleton-spicules acuate and 

 (or) acerate. Flesh-spicules trichites. 



Thrinacophora cervicornis^ n. sp. 

 Erect, dichotomously branched, like a stag's antler. Greyish 

 * hivbpov, tree, from the arborescent form of D. bidentifera. 



