234 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The specimen from Albatross station 5406 has 12 arms with both IIBr series 2. 

 It resembles the specimen from station 5367, but the dorsal carination of the division 

 Belies and arm bases is slightly more prominent. 



There are 22 specimens from Albatross station 5410. Of these, 17 have 10 arms, 

 usually between 100 and 115 mm. long, those of the largest 140 mm. long. Three have 

 11 arms, the IIBr series being 2 in each case. One has 12 arms with both IIBr series 2. 

 The last has 6 rays and 12 arms. 



Of the 2 specimens from Albatross station 5536 one has 10 arms 125 mm. long; 

 the other is of the same size with 12 arms, both the IIBr series being 2. 



From Albatross station 5537 there are 2 nearly perfect specimens, both with arms 

 140 mm. long; both have regenerated disks. One has 12 arms, both IIBr series being 2. 

 The other has 11 arms; there are two IIBr 2 series, but one postradial series is not di- 

 vided, the IBr 2 bearing a pinnule instead of being axillary, as in Eudiocrinus. 



In a very young specimen from Albatross station 5236, tentatively referred to this 

 species, the lateral eversion of the elements of the IBr series and lower brachials is very 

 pronounced, and the characteristic median carination is indicated on the IBr series and 

 lower brachials; tubercles, however, have not as yet appeared. This individual is 

 remarkable for the very large size of the external ends of the basal rays. 



The 2 specimens from Albatross station 5510 each have 10 arms 100 mm. long. 



One of the specimens from the Danish expedition to the Kei Islands station 56 has 

 10 arms about 80 mm. long. There are 1 1-13 cirrus segments. The edges of the radials 

 and IBri and the proximal edge of the axillaries are very strongly serrate, and the distal 

 edges of the axillaries are strongly everted. The axillaries have a sharp median keel 

 on either side of which is a single large tubercle. The first two brachials have a row of 

 three large and sometimes also two or three small tubercles, the middle one largest, 

 forming a blunt median keel. The first syzygial pair has a strongly and broadly everted 

 distal edge which is sometimes lobate, and below this a transverse row of 5 or 6 tubercles 

 of various sizes, the middle one always the largest. The following wedge-shaped 

 brachials have the distal edge strongly and broadly produced — so broadly that almost 

 I he entire dorsal surface is involved. Below the produced distal edge there is a series of 

 swellings, or more or less distinct tubercles; or the production may occupy the entire 

 dorsal surface of the brachial. The triangular and following brachials have the distal 

 border somewhat produced and usually more or less bluntly serrate; they bear a low and 

 rounded median keel. 



The pinnule segments are more or less produced at the edges, so that the borders 

 of the pinnules are strongly serrate 



Another specimen from the same station has 10 arms 75 mm. long, and the cirri 

 with 12 14 segments. The dorsal pole of the centrodorsal is irregularly tubercular. 

 The elements of the IBr series are irregularly tubercular, the axillaries with strongly 

 everted and irregularly crenulate edges and a high median keel. The first two brachials 

 have an elongate median tubercle, everted and crenulate edges, and a rugose dorsal 

 surface. The following brachials have a strongly everted distal edge and a rounded 

 median tubercle fused with, or incorporated in, this everted distal border; as the bra- 

 chials become obliquely wedge-shaped this transforms into a narrow and inconspicuous 

 median keel that persists to the arm tips. 



