1894.] ECHIXODEBMS OP MACCLESFIELD BAWK. 401 



low centrodorsal bare of cirrus-sockets. The first syzygy is on 

 the third brachial, tbe next on or about the thirteenth. The most 

 proximal brachials are square, those that succeed them are tri- 

 angular. The second pinnule is very long and stiff, much longer 

 than the first or third. Arms purplish, with yellowish dots and 

 patches ; the cirri yellowish at base and purplish at tip. 



Spread 120 mm. ; diameter of disc 6 mm. 



Macclesfield Bank, 13 fins. 



A> T TEDON MOOBEI, Sp. UOV. 



This species is probably most nearly allied to A. compressa, 

 P. H. C, but it has only faint spinous processes on the cirrus- 

 joints. Cirri 25 to 30, with 25 joints. Centrodorsal bare in the 

 middle. No syzjgies on radials, distichals, or palmars. There 

 may be post-palmars. The third brachial syzygial ; arm-joints 

 iii.-vi. squarish, the succeeding triangular, and the more distal 

 gradually overlapping. 



Colour purplish, with the free ends of the arms white. 



Macclesfield Bank, 13 fms. 



The single specimen is a good deal broken, but it is interesting 

 as belonging to a series of the group of which Dr. Carpenter knew 

 only one type. 



A^TEDOX EIELDI, sp. UOV. 



Allied to A. moorei, but distinguished from it by the broad spine 

 on the cirrus-joints. Cirri about 20, with IS joints, almost com- 

 pletely covering the centrodorsal. No syzygy on radials or 

 distichals ; the first on the third brachial. 



Colour bright purple with lighter cirri. 



Macclesfield Bank, 22-30 fms. 



I offer a brief diagnosis of this species, as the peculiarity of the 

 broad spines on the cirrus-joints ought to be known. 



I associate with these two species the names of the commanding 

 officers of H.M. ships 'Peuguin' and ' Egeria,' Captain W. U. 

 Moore, R.N., and Commander A. M. Field, R.N. 



There is yet another bidistichate species, which is altogether too 

 much broken for description (13 fms., Macclesfield Bank), which 

 has about 30 cirri and 20 smooth cirrus- joints. There are distinct 

 signs that a re-arrangement of the useful key given by Carpenter 

 of the " Spinifera-group " will soon be needed. Considering the 

 large number of new species assignable to this group found by 

 Mr. Bassett- Smith, I cannot but wonder that none Mere found by 

 the lamented Dr. Brock in his expedition to Amboina, the neigh- 

 bouring region. I do not know what led Dr. C. Hartlaub to say 

 of the group that it " umfasst . . . Formen, die in AYesentiichen 

 dem Caraibischen Meere angehoren " \ but it was not the then 

 known facts of distribution ; still less is the statement accurate after 

 the discoveries at Macclesfield Bank. 



1 Op. rib. p. 75. 



