Clark — New Genera and Species of Crinoids. 225 



the end of each joint; P 3 comparatively stout and stiff, 8mm. long, with 

 twelve joints, the first not quite so long as broad, the second squarish, the 

 following becoming elongated, and about three times as long as broad 

 distally; the second to the fifth joints have a sharp dorsal keel, and from 

 the third onward the median portion of the exterior surface of the distal 

 end of the joints is produced, forming a moderate "lateral process," as 

 described by Carpenter in H. variipinna ; this is repeated, though not 

 so strongly, on the opposite side of the pinnule; in the distal portion the 

 entire distal end of the joints is somewhat overlapping; P 4 and following 

 pinnules 4mm. long, with twelve joints, increasing in length to the third, 

 which is squarish, then increasing distally to about three times as long as 

 broad, the three or four terminal joints shorter again. The distal pinnules 

 are 6mm. long. 



Color (in spirits). — Flesh color, clouded with violet. 



Type locality. — Singapore. 



Type, in the collection of the University of Copenhagen. 



Himerometra ensifer sp. nov. 



Centro-dorsal thick-discoidal, the cirrus sockets arranged in two closely 

 crowded, irregular, more or less alternating rows. 



Cirri xv-xx, 30, 20mm. -25mm. long; first joint very short, the fol- 

 lowing gradually increasing to the sixth, which is squarish; next five or 

 six joints slightly longer than broad, the length then very gradually de- 

 creasing, the distal joints being about one-third broader than long; tenth 

 and following joints with well developed dorsal spines; opposing spine 

 and terminal claw as in H.- schlcgelii. 



Disk completely covered with a pavement of small plates. 



Arms as in //. discoidea ; but the synarthrial tubercles are produced 

 extravagantly, as in Perometra diomedese, giving the animal a very char- 

 acteristic appearance. 



All the proximal pinnules have squarish joints; J > 1 is 7mm. long, very 

 slender, with 20 joints; P 2 is 7mm. long, stouter than P b with 17 joints; 

 P 3 is similar to P 2 , but is only 5mm. long, with 16 joints; P 4 and the 

 following pinnules are less stout than P 2 and P 3 (though stouter than 

 Pi), 5mm. long, with IS joints. 



The ten arms are 80mm. long. 



Color (in spirits). — Nearly white to dark brown, the perisome darker; 

 the cirri of the lighter specimens are usually purplish. 



Type locality. — Singapore. 



Type, in the collection of the University of Copenhagen. 



Genus CYLLOMETRA A. H. Clark. 



Cyllometra anotnala sp. nov. 



Centro-dorsal a thick disk with a broad, slightly concave, polar area, 

 the cirrus sockets arranged in two irregular, crowded, more or less 

 alternating rows. 



