48 



the polyps arc slender spindles, straight or curved, and a few slightly flattened 



forms. All have spiny projections, which are very marked in some of the smallest. 



The following measurements were taken of length and breadth in millimetres : 



1. General polyp spicules, IxO'l; 0'8 x 0'09 ; O'GxO'05; 0'35x0'03. 



2. Tentacular spicules, 0'18 x 0'04 ; 0-14 x 0'04 ; 0'12 x 0'04. 



3. Those that project at the apex, I'6x0'09; 1'45 x O'l ; 1 '4x0.12; 



l'3xO'l ; 1-2x0-1. 



The spicules of the stem are similar to those of the polyps except for their 

 smaller size. Their measurements are : 



0-8x0-095; O'SxO'OS; O'SxO'OG; 0'35x0'09; O'SxO'OS. 



Among the spicules, both of the polyp and of the general coenenchyma, there 

 are some more irregular forms, with processes about O'l mm. in length, bearing- 

 small spines. 



We do not think that there is any valid distinction between A. aspera, 

 Pour tales, and A. spinosa, Hiles. 



Locality : Station 333 ; 6 31' N., 79 38' 45" E. ; 401 fathoms. 



Previously recorded from Havana, and A. spinosa (Hiles) from Blanche Bay, 

 New Britain. 



