A MONOGRAPH OF THE EXISTING CRINOIDS 557 



In 1 of the 2 specimens from Bock's station 14, as described by Gisldn, the centro- 

 dorsal is almost hemispherical, 9 mm. in diameter. The free dorsal pole is 5 mm. in 

 diameter, and is a little hollowed in the middle. The cirri are arranged in 2 rows. 



The cirri are XXXVIII, 28-33, from 30 to 36 mm. in length. The first and 

 second segments are short, the third-fifth are about as long as broad or slightly 

 longer than broad, and the sixth-tenth are half again as long as broad. The distal 

 segments are twice as broad as long. The dorsal processes begin from the fifteenth 

 to the twentieth segment. Their height is equal to about one-fifth the width of the 

 segments. There is a weak opposing spine. The terminal claw is half again as long 

 as the segment which bears it, and is slightly curved. 



The radials are partially visible in the interradial angles. The IBr! are four 

 times as broad as long, and are united in the proximal half. Just above their point 

 of union there is a pit in the dorsal perisome. The IBr 2 (axillaries) are three times 

 as broad as long, pentagonal, with the distal edges slightly concave. They are from 

 6.5 to 7 mm. in width. The IIBr and IIIBr series are 4 (3 + 4). The division series 

 are broad, smooth, and flattened, but the dorsal perisome is quite visible between 

 them. The first ossicles following each axillary are united interiorly, there being 

 beyond the point of union a pit in the perisome. 



The 38 arms are 125+ mm. long. The brachials are distally somewhat, but 

 only slightly, thickened. There are 16 brachials for each 10 mm., or 13 if the syzygial 

 pairs are counted as units. 



The first brachial syzygy occurs between brachials 3+4. The second is from 

 between brachials 6 + 7 to between brachials 8 + 9, but is commonly omitted. The 

 third, which on many arms is the second, is from between brachials 14 + 15 to between 

 brachials 21 +22. The distal intersyzygial interval is 4 muscular articulations. 



P D is 30 mm. long and is composed of 50-55 segments, of which the terminal 



5 do not bear teeth. The comb is composed of 20 low thin teeth which in length are 

 equal to about one-quarter the width of the segments which bear them. The pinnule 

 on the IIIBr series is about 25 mm. long and is composed of 45 segments the terminal 



6 of which do not bear teeth. The comb is composed of 15 teeth. P, is 22 mm. long 

 with 45 segments, of which the last 5 do not bear teeth. The comb is composed of 

 15 teeth. P 2 is 10 mm. long and carries a comb with 8 teeth. P 3 is 8 mm. long and 

 bears a comb with 6 teeth. P 4 and P 5 usually bear a rudimentary comb. The distal 

 pinnules are 10 mm. long with about 25 segments. 



The disk is 32 mm. in diameter, reaching to the IIBr 2 or IIBr 3 . It is without 

 granules. The mouth is adradial. The anal cone is 6 mm. long. 



The color is dorsally light yellow, ventrally yellow red, with a sharp dividing 

 line, especially on the sides of the division series. 



The other specimen from Bock's station 14 has the centrodorsal 9 mm. in diam- 

 eter and 2 mm. high. The dorsal pole is rather flat, G mm. in diameter. 



The cirri are XXXIV, 28-31, from 30 to 38 mm. long. 



The elements of the division series are a little thickened at the articulations, 

 aud therefore the arm bases are not quite as smooth as in the preceding specimen. 



The 38 arms are 140 mm. in length. 



