Clark — New Genera and Species of Crinoids. 231 



Type, in the collection of the University of Copenhagen, from an un- 

 known locality. 



Genus HELIOMETRA A. H. Clark. 

 Heliometra glacialis biarticulata sub. sp. nov. 



Similar to typical H. glacialis from Labrador and Greenland, but the 

 proximal joints of the lower pinnules are more strongly carinate, the cirri 

 are more noticeably spiny, the brachials rather more overlapping, and the 

 distal intersyzygial interval is three instead of four oblique muscular artic- 

 ulations. 



The longest cirri are about 50mm long, with 60-70 joints; the arms are 

 somewhat over 150mm. long. 



Pj 27mm. long, with sixty short joints, the distal half rather promi- 

 nently serrate; P 2 similar, and of the same length; P 3 25mm. long, all 

 the joints proportionately slightly longer, most of them being about half 

 again as long as wide, and the distal portion not serrate; P 4 17mm. long, 

 with twenty-six joints, the first six squarish, then gradually becoming 

 elongate, and about twice as long as broad distally; this pinnule is stouter 

 than the preceding, and, while tapering evenly to the tip, is not flagellate. 



Color (in spirits). — Light yellow. 



Type locality. — ?Straits of Tsugaru, between Hokkaido and Honshu, 

 Japan. 



Type, in the collection of the University of Copenhagen. 



