336 Messrs. S. 0. Ridley and A. Dendy on 



tate cylindricals witli oval heads, size '28 by '0063 raillira. ; 

 (3) slender tricliites, size •35 by '002 millim. 

 Locality. Off south-west coast of Patagonia. 



Tedania actiniiformis, n. sp. 



Sessile, cylindrical, attached by narrowed base ; abruptly 

 truncate above, forming a flat surface, which bears small 

 oscular tubes. Height | inch. Colour greyish brown. 

 Texture soft and spongy. Pores in a definite narrow zone 

 about ^ inch below top, very abundant. Main skeleton a 

 diffuse and irregular reticulation of acuates. Dermal reticu- 

 lation below the pore-zone irregular, above it forming a low 

 wall of thickly-packed, vertically-disposed acerates (cylin- 

 dricals). Spicules: — (1) stout, slightly curved, rather blunt 

 acuates, size '87 by '03 millim. ; (2) hastately-pointed 

 cylindricals, size '5Q by "019 millim. ; (3) acerate trichites, 

 size "56 by •0031 millim. 



Locality. Station 299, off Valparaiso, 2160 fath. 



Genus Teachytedania (Ridley). 

 Acuates spined. 



Trachytedania patagonica^ n. sp. 



Massive, amorphous. Pale yellow. Soft and crumbling. 

 Skeleton a very loose and irregular reticulation of spicules, 

 with tufts of acerates (cylindricals) near the surface. Spi- 

 cules : — (1) rather stout, slightly curved, entirely spined 

 acuates, size "35 by '0125 millim.; (2) short, straight acerates 

 (cylindricals), subfusiform, somewhat hastately pointed, size 

 •245 by 'OO? millim. ; (3) very fine acerate trichites, length 

 about '2 millim. 



Locality. Station 308, off south-west coast of Patagonia, 

 175 fath. 



Subfamily iv. Desmacellina. 

 (Characters as given for the sole genus, Desmacella.) 



Genus Desmacella (Schmidt). 



Skeleton-splcules acuate to spinulate. Flesh-spicules bi- 

 liamates or tricurvates or both. 



[Desmacella annexa, Schmidt. 

 Locality. Station 24, West Indies, 390 fath.] 



