MONOGRAPH OF THE EXISTING CRINOIDS. 543 



The borders of the terminal stem plate are produced into five long digitiform 

 processes. 



No. 22 (fig. 907, p. 538) : Dredged on September 1, 1902, in 385 meters. 



Total length, approximately 22 mm. 



There are 40 columnals. 



The borders of the terminal stem plate are produced into five long digitiform 

 processes. 



The radials, which are very broadly in contact laterally and have an almost 

 straight horizontal distal border, are about as long in the midradial line as the 

 interbasal sutures. 



The orals are short and broad. 



No. 23 (fig. 908. p. 538) : Dredged on January 28, 1903, at a depth of 350 meters. 



Total length (distal portion of column missing), 4.3 mm.; length of calyx, 

 0.7 mm. 



The portion of the column which is attached to the calyx consists of 14 

 columnals, of which the first 6 are very short and the following rapidly increase 

 in length, so that the twelfth and following are more than six times as long as 

 broad. A median girdle is evident on all, and on the first six projects beyond the 

 general surface. The elongated segments are cylindrical without a central con- 

 struction or enlarged ends. 



The basals form a broad strongly rounded cup which is half again as broad 

 across its distal margin as high. 



The radials are rhombic, broader than long, in contact by their lateral angles 

 except in the posterior interradius. 



There appear to be five infrabasals. 



The radianal occupies its original position, in that its center is practically 

 on the same level as the center of the adjacent radial. This radial (the right 

 posterior) has the left side cut away beyond a concave line running from the left 

 side of the base of the IBr, to the middle of the right distal border of the posterior 

 basal. 



The IBr, and IBr„ are developed, but there are as yet no brachials. 



Tlie orals are large, with the proximal triangular flattened area, the distal 

 rhombic more or less flattened area, and the everted lateral regions as previously 

 described. Their tips, wliich are spinous, extend considerably beyond the distal 

 borders of the IBrj. 



No. 24 (fig. 909. p. 538) : Dredged on July 31, 1902, in 385 meters. 



This specimen in all essentials resembles the preceding. The IBr, and IRr. 

 are present; the radials have not quite come into lateral contact; the excision of 

 the left side of the right posterior radial for the reception of the radianal is 

 not quite so extensive as in the preceding. 



No. 25 (figs. 910-912, p. 541) : Dredged on April 17, 1902, in 385 meters. 



Total length, 9.4 mm. ; length of calyx, about 0.8 mm. 



The column consists of 28 cohimnals and the terminal stein plate. The first 

 six columnals are short and discoidal. the following rapidly increasing in length 



