A MONOGRAPH OF THE EXISTING CRINOIDS 239 



parallel to about the midline, then converge and meet in a more or less sharp point over 

 the inner ends of the first brachials. The surface is scarcely modified. The first 

 syzygial pair (composed of brachials 3+4) is somewhat longer interiorly than exteriorly, 

 and is usually about three times as broad as the median length. The surface of both the 

 hypozygal and epizygal is somewhat swollen, and each has a more or less conspicuous 

 large median tubercle. The next eight brachials are slightly wedge-shaped, four or 

 five times as broad as the median length. The distal half is rather abruptly thickened, 

 standing up as a thick transverse band across the arm. The segments following soon 

 become almost triangular, slightly broader than long, with the distal portion unmodified, 

 except that the distal edge is very finely spinous. On the short brachials following 

 the first syzygial pair the median portion shows a more or less marked broad rounded 

 tubercle ; on the longer brachials following this becomes a fairly conspicuous low narrow 

 rounded median carination which is traceable to the arm tips. 



PI is 6-7 mm. long with 17-20 segments, slender and flexible, tapering gradually 

 and regularly from the base to the tip. The first segment is about two and one-half 

 times as broad as long, and those following very slowly increase in length, the terminal 

 being about as long as broad. The proximal border of the segments is in the form of an 

 obtuse angle the apex of which is truncated by the straight distal border of the segment 

 preceding. On the first seven or eight segments the two free sides are straight and 

 parallel with the axis of the pinnule; beyond this the sides curve inward from the 

 distal angles. 



P 2 is of the same length as PI or very slightly longer or shorter, and is composed of 

 15-17 segments. It resembles Pj but is slightly less broad basally and also tapers more 

 gradually so that it appears stouter in the distal half. 



PS is usually 6 mm. long with 14 segments, resembling P 2 but stouter; it may, how- 

 ever, be slightly longer than the pinnules preceding, 7 mm. long with 15 segments of 

 which the fifth is somewhat and the sixth is considerably enlarged, the next two seg- 

 ments decreasing hi width rather rapidly so that those beyond are slender and twice 

 as long as broad. On some pinnules the fifth to eighth segments are all almost equally 

 enlarged. 



P 4 is 7 mm. long with 15 segments of which the fourth and fifth are considerably 

 enlarged, and those following slowly decrease in size. The gonads are completely 

 protected ventrally by numerous stout plates of various sizes. 



The pinnules following resemble P 4 . The distal pinnules are 7 mm. long with 18-19 

 segments which have slightly everted and very finely spinous distal ends. 



The disk is almost completely covered with papilliform granules. 



Another specimen from the Danish Expedition to the Kei Islands station 12 has 

 14 arms 120 mm. long; two of the post-radial series bear two IIBr series; in each case 

 that to the left is 4(3+4) and that to the right is 4. A third specimen has 12 arms 

 70 mm. long, two IIBr 2 series being present. A fourth has 11 arms 70 mm. long. 

 The fifth has 10 arms 90 mm. long. 



The specimens from the Danish Expedition to the Kei Islands station 56 were 

 originally regarded as representing a new species which was called Glyptometra hector. 

 The type specimen may be described as follows: 



The centrodorsal is truncated conical, about twice as broad at the base as high, 

 with a rather small, smooth, and slightly convex dorsal pole. The cirrus sockets are 



