NO. 1561. NEW UNSTALKED CRINOIDS— CLARK. 137 



in the distal half short; the cirri are broadest in the distal third; ter- 

 minal claw very small; there are no dorsal spines on the proximal 

 joints, and the distal dorsal spines are not so prominent as in 

 A. anthus. 



Basals visible as a more or less prominent interradial tubercle. 



First radials short; second i-adials rather large; axillaries triangular 

 or pentagonal, rather low; the radials are carinate, usually rather 

 strongly; distichals (when present) 2, resembling the two outer radials, 

 but rather higher in proportion to their width. Ten to twelve arms, 

 95 mm. long, of more than 100 joints, at first oblong, rather short, 

 becoming triangular, wider than long after about the ninth, and about 

 the middle of the arm becoming laterally compressed and developing 

 strong forward-projecting median spines. The last four or five joints 

 are very short, high, and compressed, bear no pinnules, and are strongly 

 curved inward, giving the appearance of the arm having been broken 

 off at the tip, as the distal pinnules exceed the arm joints by 3 or 1 mm. 

 A syzygy in the third brachial, another in the ninth-eleventh, and 

 others distally at intervals of 1 or 5 joints. 



The pinnules are styliform and very stiff, like those of ^1. onthu!^; 

 the first pinnule consists of 13 joints, and is only slightly, when at all, 

 shorter than the second, which consi.sts of 10. The remaining pinnules 

 are very uniform in length, and have about 15 joints; all are strongly 

 carinate. 



Color in life light brownish-yellow, cirri white. 



Type.— C^t. No. 22626, U.S.N.M.; from Albatross station No. 4935; 

 30° 57' 20" north latitude, 130° 35' 10" east longitude (off Kagoshima 

 Gulf); 103 fathoms; August 16, 1906. 



g. ANTEDON HANA," new species. 



Centro-dorsal small, hemispherical, divided by 5 interradial lines 

 into trapezoidal areas, each with 2 rows of cirri of 2 each, making 20 

 in all. Cirri 45 mm. long, slender and much compressed, with 65-75 

 short joints, basally slightl}^ longer than wid(\ becoming wider than 

 long after about the twenty-fifth, the joints distally developing sharp 

 dorsal spines. 



First radials crescentic, ver}^ narrow, with a fringe of teeth along 

 the superior liorder; second radials narrow, very deeply incised by the 

 axillaries, and furnished with teeth along their entire edge; axillaries 

 slightly wider than long, with a high median keel in the posterior half. 

 Ten arms, 60 mm. long, with about 100 joints, the first 8 roughl}^ 

 oblong with strong lateral processes and a blunt median keel, overlap- 

 ping in a short spine anteriorly, the succeeding joints quadrate, much 

 compressed, with a shai'p median keel and long overlapping spine. 



« From the Japanese word hana, signifying flower. 



