558 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



On the distal half of the sides of the IBr a are a number of long webbed spines 

 which form broadly rounded spinous lateral extensions of the narrow distal end, 

 increasing its width to more than that of the base. 



The lateral angles of the IBr 2 are more or less spinous. 



All of the brachials have the distal border armed with more or less everted 

 and prominent spines, and each bears a pair of sacculi, but no covering plates. 



No pinnules are as yet developed. 



The bases of the orals, which appear to resemble those of Promachocrin/us, 

 are separated from the distal border of the radial circlet by a broad unplated 

 strip of perisome equal in breadth to about half the height of the IBr.,. 



No. 2 : Dredged on June 25, 1902, at a depth of 385 meters. 



The column consists of 32 columnals, including the centrodorsal, and distally 

 carries a portion of the terminal stem plate. 



The centrodorsal is discoidal, four or five times as broad as high and slightly 

 swollen in the interradial areas, over which there are small rounded notches in 

 the proximal border of each basal. 



The following columnal is nearly as large and about two-thirds as high and 

 is similarly swollen interradially. The third and fourth from the calyx are of 

 the same size, each about half as high as the centrodorsal, and slightly swollen 

 interradially; the next three are short and discoidal, rather abruptly less in 

 diameter than the preceding. The following increase rapidly in length to the 

 seventeenth-twenty-first, which are the longest, about five times as long as broad, 

 then decrease gradually to the one adjoining the terminal stem plate, which is 

 about as long as broad. The elongated columnals are of the bourgueticrinoid type 

 with swollen ends which become prominent in the distal half. 



Two rudimentary cirri reaching to the lateral angles of the basals and the 

 base of a third are present. They are radial in position. 



In profile the sides of the calyx to the distal border of the radial circlet are 

 nearly straight, and diverge from the centrodorsal at approximately a right angle. 



The basals are of moderate length and offer no peculiarities, except that in 

 the posterior the left distal side is about twice as long as the right. 



The radials are well developed. In the median line they are about as long 

 as the interbasal sutures, and the large articular face occupies about three-quarters 

 of their distal border. Just below the proximal angles of the IBr a on either side 

 conspicuous spines are developed. 



The radianal, which is long and narrow, resembles that described in the other 

 specimen. 



The sides of the IBr, converge distally, so that the distal end is about half as 

 broad as the proximal; but in the distal half the borders are armed with long 

 and prominent more or less webbed spines which are longest at the distal angles; 

 including these spines the IB^ are slightly broader distally than proximally, with 

 broadly rounded distal angles. 



The IBr, are shield shaped, distally as wide as the distal ends of the IBr 1? 

 including the spines, proximally converging to a rounded point, with spinous 

 lateral angles. 



