A MONOGRAPH OF THE EXISTING CRINOIDS 369 



The cirri are X, 10, about 7 mm. long, short and stout. The first segment is very 

 short, the second is about twice as long, the third is about twice as long as the second, 

 and about as long as broad. The segments following are somewhat longer than broad. 

 The penultimate segment bears a. prominent opposing spine. The terminal claw is 

 about as long as the penultimate segment and is stout and moderately curved. 



The ends of the basal rays are visible as interradial tubercles. 



The radials are short and bandlike with curved proximal and distal borders; the 

 lateral edges are raised into blunt tubercles. The IBr! aro somewhat longer, about 

 four times as broad as long, and arc bluntly carinate. The IBr 2 (axillaries) are short, 

 low-triangular, about three times as broad as long, with a low blunt median keel. The 

 ossicles of the IBr series and first four or five brachials have slightly flattened sides. 



The 10 arms are 45 mm. long. The earlier brachials are oblong with a blunt 

 median keel, becoming wedge-shaped after the fifth, after the ninth nearly triangular 

 and somewhat broader than long, and elongate and wedge-shaped again distally. 



Syzygies occur between brachials 3+4, again at about brachials 11 + 12, and 

 distally at intervals of 4 or 5 muscular articulations. 



PI is 2.5 mm. long with 10-13 short segments of which the first four or five are 

 considerably broader than the others; the segments are about as long as broad, rounded 

 trapezoidal in shape, making the distal corners very prominent. P a is similar to P t 

 but slightly shorter with the basal segments not so much enlarged. P 2 is 2 mm. long 

 with 6 segments of which the third and fourth are greatly expanded laterally. The 

 next five pinnules are similar to P 2 with t> or 7 segments of which the third and fourth 

 and sometimes also the fifth are greatly expanded laterally and support the large 

 globose gonads. Distally the pinnules become uniformly tapering and slender, reaching 

 3.5 mm. in length with about 12 segments of which the first is short, the second is 

 about as long as broad, and the remainder are somewhat longer than broad. 



The disk is scantily plated. Side and covering plates are well developed along the 

 brachial and pinnule ambulacra, and the gonads are protected ventrally by a pavement 

 of large irregular plates. 



The color in life is bright yellow. 



Notes. The specimen from south of the Goto Islands in the Copenhagen Museum 

 is considerably larger than those obtained by the Albatross in the same general region. 

 The arms are about 60 mm. long. P 2 is more nearly like PI than in the Albatross speci- 

 mens, in which P 2 resembles P 3 . All the brachials except the first three or four have 

 strongly produced and overlapping distal ends. The color of the specimen is dull 

 orange, possibly due to a slight alkalinity in the containing alcohol. 



Localities. Albatross station 4890; 10 miles southwest of the Goto Islands; Ose 

 Saki Light bearing N. 2 W., 10 miles distant (lat. 3226'30" N., long. 12836'30" 

 E.); 243 meters; bottom temperature 11.28 C.; rocky bottom; August 9, 1906 [A. H. 

 Clark, 1907, 1908, 1909, 1912, 1913, 1915, 1918, 1921] (5, U.S.N.M., 22635 [type], 

 35692). 



Eastern Sea south of the Goto Islands (lat. 3210' N., long. 12820' E.) ; 180 meters; 

 Captain Schonau, April 23, 1898 [A. H. Clark, 1909, '1913, 1915, 1918] (1, C. M.). 



Eastern Asia (1, C. M.) 



Geographical range. Known only from the Eastern Sea south of the Goto Islands. 



Bathy metrical range. From 180 to 243 meters. 



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