1894.] ECHINODEBMS Or MACCLESriELD UANK. 403 



Mr. Sladen, who has cleared from the genus a number of species 

 that do not appear to belong to it. 



E = 40, »• = 6 ; or E nearly = 7 r. 



Arms very delicate, only 5 mm. wide at their base, with about 45 

 marginal plates ; the supero-iuarginals nearly twice as deep as wide 

 at base, but gradually becoming more shallow, so that they are 

 nearly square in the distal two-thirds of the arm. The infei-o- 

 marginals ordinarily have one spine long enough to reach the upper 

 surface of the supero-marginal ; occasionally there is a second 

 smaller, but still evident spiue. The adambulacral armature is 

 diplacanthid, and there are ordinarily three divergent spines in each 

 row. 



On the upper surface " the medioradlal line of plates " becomes 

 somewhat indefinite in the distal portion of the arm. 



It is not easy to be sure that the specimen from which this 

 description is drawn up is mature ; it is, at any rate, old enough 

 to have lost one arm and part of another; the latter has already 

 begun to repair itself. There were taken at the same dredging 

 (35-41 fms.) several obviously young specimens of this species ; 

 they have a marked Astropectinine appearance, owing doubtless to 

 the fact that the medioradial line has not yet been differentiated. 



LUIDIA MACULATA. 



Liiidia maculata, M. Tr. Syst. Ast. (1842) p. 77. 

 All the specimens collected were of small size. 



Ltjidia longispinis ? 



Luidia lo7igisjJina, Sladen, Chall. Eep. Ast. xxx. p. 254 (1890). 

 I have not much hesitation in referring several young specimens 

 to this species. 



Luidia ronpiciFEE. 



Luidia forjicifer, id. op. fit. p. 258. 



I have been able to recognize this species of Mr. Sladen's in 

 Mr. Bassett-Smith's collection ; the types come from or near Torres 

 Strait. 



Ltjidia sp. 



I am unable to assig-n to any described species known to me 

 three young specimens, \i hich have suffered a considerable loss of 

 arms and have undergone repair by gemmation. 



GoNioDiscrs sp. 



There was taken at a depth which cannot now be certainly ascer- 

 tained a young specimen of what may perhaps prove to be a 

 juvenile example of G. rurjosus, Perrier. 



Cttlcita sp. (Plate XXYI. fig. 1.) 



A quite young, nearly spherical, specimen -svith a diameter of 



