356 BULLETIN OF THE 



appears to be a different species, — at least, as far as his description 

 goes. 



Antedon armata Pourt. Ten arms ; centrodorsal plate flat, 

 rather large, bearing about fifteen cirrhi on its circumference. Cirrhi 

 of about 20 joints, shorter than their diameter; all except the 3 or 4 

 first ones provided with a short spine on the concave side ; last joint 

 with a claw, and penultimate with an opposing spine. First radial pro- 

 truding from the ceutrodorsal plate ; second radial nearly as long as 

 broad ; radial axial pentagonal. First brachials nearly scpiare, barely 

 in contact by their lower corners ; second brachial with a large socket 

 lor the first pinnule, which is twice as long and more than twice as 

 thick as the second ; of its 9 or 10 joints the 4th is remarkably long, 

 forming about one fourth of the total length ; the other pinnules are 

 rather short, and are formed of the same, number of cylindrical joints. 

 Joints oi' the arms smooth, oblique, edges not prominent. Seven or 

 eight joints form a syzygium. 



One specimen only was dredged in 35 fathoms, west of the Tortugas. 

 The spiny cirrhi make it resemble Antedon ( Comatula) Milbcrti Miiller, 

 said to be from North America, but the other characters do not agree. 



Antedon cubensis Pourt. Ten arms ; mouth central. Cen- 

 trodor.-al plate conical, covered with cirrhi nearly to the tip. Cirrhi 

 very long and slender, of 28 cylindrical joints. First radial concealed 

 by the centrodorsal plate, second very short ; axial radial pentagonal or 

 shield-shape. First brachials very short. Arm-joints with imbricated, 

 serrated edges; five to seven forming a syzygium. First pinnule not 

 much longer than the second, the others rather short and slender, con- 

 sisting of about ten joints, and increasing in length towards the end of 

 the arm. 



Two specimens in 450 fathoms on the coast of Cuba. It resembles 

 somewhat A. Sarsii, but differs from it by its flatter centrodorsal plate, 

 and by an entirely different shape in the 1st and 2d brachials, particu- 

 larly the second, which has not the projection into the first brachial, 

 like A. Sarsii. 



Antedon rubiginosa Pourt. Ten arms; mouth central. Cen- 

 trodorsal plate slightly convex, bearing 15 to 20 cirrhi in one or two rows 

 around the circumference ; each cirrhus of 10 nearly cylindrical joints, 

 the 3d, 1th, and 5th longest, the penultimate with an opposing point. 

 First and second radials visible, the latter about half as long as broad; 



