A MONOGRAPH OF THE EXISTING CRINOIDS 121 



PI is 17 mm. in length and is composed of about 40 segments, of which the ter- 

 minal 9 bear teeth. P 5 is 8 mm. long and bears a comb. P 8 is 9.5 mm. long with 23 

 segments and has no comb. The distal pinnules are 10.5 mm. long with 21 segments. 



The disk is 7.5 mm. in diameter. The mouth is central. The anal tube is 2.5 

 mm. high. 



Localities. Albatross station 4893; Eastern Sea, between 10 and 20 miles south- 

 west of the Goto Islands; Ose Saki Light bearing N. 29 E., 5.5 miles distant (lat. 

 32 32' 00" N., long. 128 32' 50" E.); 174-194 meters; bottom temperature 13.28 

 C.; gray sand, broken shells and pebbles; August 9, 1906 [A. H. Clark, 1908, 1912] 

 (1, U.S.N.M., E. 1309). 



Mortensen's station 9; southwestern Japan, off Kiu Shiu (lat. 32 15' N., long. 

 128 12' E.); 164 meters; hard bottom; May 15, 1914 [Gisl<n, 1927]. 



Remarks. It is rather curious that in the case of this species I should have 

 fallen into the same error that Carpenter did when he described his Actinometra 

 notata. I first mentioned the type and only known specimen (though with no 

 indication of the basis for the record) under the name of Comatula paucicirra in 1908. 



This error was soon discovered, and the species was described in detail in 1912. 



In 1927 Dr. Torsten Gislen recorded and gave notes upon a second specimen 

 taken not far from the locality where the type had been dredged by the Albatross. 



COMATELLA BRACHYCIRRA Glsln 



Comatella brachycirra GISL^N, Nova Acta reg. Soc. sci. Upsaliensis, ser. 4, vol. 5, No. 6, 1922, p. 13 

 (description; Bock's stations 53, 55, 56, 59); figs. 1-3, p. 28; pi. 1, fig. 1. 



Diagnostic features. The cirri are not more than 7 mm. long, and are composed 

 of 9-12 (usually 10-11) segments, of which the longest are from three to three and 

 one-half times as long as broad; there are 10-18 (usually 12-15) arms which are from 

 20 to 75 mm. (usually between 50 and 70 mm.) long; there are no combs beyond 

 P 3 ; Pj has 22-28 segments, of which 7-9 bear teeth. 



Description. The centrodorsal is flattened, from 1 to 2 mm. in diameter, with a 

 small dorsal pole up to 1.5 mm. in diameter which is smooth and peripherally some- 

 what furrowed; the cirrus sockets are arranged in 1 or 2 marginal rows. 



The cirri are XII-XXV (usually XVII or XVIII), 9-12 (usually 10 or 11), 

 from 4 to 7 mm. (usually 5 to 6 mm.) in length. The first segment is somewhat 

 broader than long, the second is twice as long as broad, somewhat constricted cen- 

 trally, the third and fourth are from three to three and one-half times as long as 

 broad, the last with the distal end in part everted, the fifth is twice as long as broad, 

 and the sixth and following are about as long as broad with inconspicuous blunt 

 dorsal spines which become sharper on the two outermost. The terminal claw is 

 strongly curved and rapidly tapering, twice as long as the penultimate segment. 



The ends of the basal rays are visible as rounded tubercles in the interradial 

 angles. 



The radials are almost concealed by the centrodorsal in the midradial line, or 

 are visable as narrow bands. The IBr, are short, three times as broad as long, free 

 laterally, and synarthrially united with the IBr 2 . The IBr 2 (axillaries) are low 

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