122 PROF. F. J. BELL ON NEW [Jan. 1/, 



rounded at their tips. Madreporic plate almost subcentral. The 

 integument is thick, and has a peculiar clammhiess ; and the spines 

 developed on the surface are rather scale-like rounded processes, 

 ornamented with a radial striation ; of these an irregular series 

 extends along the median dorsal line of each ray ; towards the 

 extremity of the ray the scales become a little thinner and longer, 

 or, in other words, more spinous ; the striation may still be detected 

 on their tips. While at this end they are somewhat scattered, they 

 are more numerous at the base of the arm, where also they are 

 larger. Passing into the disk a complete circlet is made by these 

 processes, the aggregation at the base of each radial series being 

 brought into connexion with its fellows by interradial aggregations. 

 In this way a rather broad though somewhat feebly indicated circlet 

 of modified spines lies around the centre of the disk ; a few similar 

 spines are to be found in the central space. In the middle of one 

 of the interradial aggregations there is placed the madreporic plate, 

 which thus comes to be surrounded by a circlet of spines. On the 

 arms three rows of pore-areas may be made out on either side of 

 the median row of spines, which are the only spinous processes 

 that are developed on the abactinal surface. The marginal spines, 

 short and blunt and pretty regularly arranged, have an appearance 

 not unlike that presented by the jaw of a Cydodus. Between 

 them and the adambulacral spines there is a bare space, which, in 

 this spirit-specimen, is narrow and groove-like. The whole creature 

 is of a yellowish-white hue ; and the suckers are little darker than 

 the rest of the body. 



A single specimen. The only indication of its habitat is the 

 fact that it was collected during the voyage of the ' Erebus ' and 

 * Terror.' 



Cribrella minxjta, n. sp. (Plate VI. fig. 2.) 



R = 18 ; r = 6"5 Arms five, 6 millim. wide at their base, 

 and somewhat rapidly diminishing in breadth. The abactinal sur- 

 face plain, and similar for its whole extent. The adambulacral 

 spines fringing the groove are arranged in a single row ; there is 

 generally one for each plate ; they are of a fair size, and are 

 distinctly separated from one another. Externally to these there is 

 a series of transverse rows, containing at least three or four spines, 

 and sometimes having them arranged in double order. Beyond 

 these, and separated from them by a more or less distinct lon- 

 gitudinal groove, is a longitudinal row of closely packed spines. 

 Externally to this there are a number of combs of spines set trans- 

 versel}', which occupy the edge of the actinal surface of the ray. 

 The next series of spines is not so regularly arranged, and leads to 

 the irregular disposition of spiniferous ossicles which obtains on the 

 abactinal surface. The madreporic plate is small, obscure, and 

 marginal. No pedicellarise detected. 



The colour of the single example (which has been in spirit for 

 more than twenty-five years) is dead white. 



Ecuador (Haslar collection, J. O. Goodridge, Esq., R.N.). 



