NO. 15G1. NEW IJNSTALKED CRINOIDS— CLARK. 153 



31. COMATULA MARI^,« new species. 



Centro-dorsal discoidal, 9 ram. in diameter, bearing about 30 mar- 

 ginal cirri in two irregular rows; cirri 25 mm. long, moderate!}^ stout, 

 with 27 to 30 joints, the proximal half of which are somewdiat longer 

 than wide, the distal lialf short; from the sixth joint the distal dorsal 

 edge begins to project, forming prominent broad dorsal spines on the 

 distal two-thirds of the cirrus. 



First radial concealed; second radials rather short, very broad, in 

 apposition laterally; axillaries more than twice as broad as long, free 

 laterally. Twenty-six arms, 160 mm. long. The distichal and palmar 

 series in this species are quite unique, no other previously descril)ed 

 form at all approaching it in irregiUarity. There are 9 distichal 

 series present, 3 consisting of an axillary onl}^, 1 of 2 joints united 

 by S3'zygy, 4 of 2 articulated joints, and 1 of 4 joints, the 2 outermost 

 united by syz3^gy. Of the 7 palmar series, 3 are of 3 joints, the 2 outer 

 united by syzyg}^, 2 are of 2 joints united by syzygy, 1 is of 2 articu- 

 lated joints and 1 is of 1 joints, the 2 outer united 1)}^ syzygy. The lirst 

 arm syzygy is usuall}^ in the second brachial, but often in the first; 

 sometimes both the first and" second are syz3'gies, while again there 

 may be none until the third. Succeeding s^^zygies are quite irregu- 

 lar; the second may be anywhere from the sixteenth to the fortieth 

 brachial, and the distal intersyzjgial interval anj^where from 7 to 22 

 or more joints. The arms are slender, remarkably uniform in width; 

 the first 5 to 7 lirachials are oblong, then triangular about twice as wide 

 as long, ])ecoming short and discoidal in the distal half of the arm; all 

 the brachials overlap somewhat, the distal edges being finely serrate. 



The lower pair or two of pinnules arc 20 mm. long, and slender, the 

 lower 5 or (! joints the largest, but not especially enlarged. The fol- 

 lowing pinnules decrease rapidly in length to about the sixth pair; 

 the following 4 or 5 pairs of pinnules are comparatively stout, with 

 the 4 or 5 basal joints enlarged somewhat, after which the pinnules 

 become more elongated. The distal edges of all the pinnule joints 

 are everted, prominent, and serrate. 



Color in life brownish 3 ellow, the pinnules grayish. 



Ti/pe.— Cut. No. 22655, U.S.N.M.; from AlkUross station, No. 4880; 

 34° 16' 00" north latitude, 130° 16' 00" east longitude (near the Oki 

 Islands, Sea of Japan); 59 fathoms; August 2, 1906. 



32. COMATULA SOLASTER, new species. 



Centro-dorsal large, flat, and discoidal, bearing about 20 cirri in a 

 single marginal row; these have about 20 or 21 (rarely more, though 

 sometimes as many as 30) joints, the third to the seventh much elon- 



aFor Mrs. Mary W. Clark, of Boston, who has been of great assistance to me in 

 my work on the unstalked crinoids. 



