224 Clark — New Genera aud Species of Crinoids. 



the base to the delicate tip, with about eighteen joints, all of which arc 

 practically squarish; P 2 about 7.5mm. long, slightly stouter than P- 1( 

 Imt slender and delicate distally, with about eighteen joints of which the 

 first two are not quite so long as broad, the next two are squarish, the 

 remainder gradually becoming elongated and about twice as long as broad 

 distally; P 3 about ^'mm. longer than P 2 , stouter and stifler, though the 

 joints are in the same number and proportion; P t resembling P 3 , but 

 shorter and somewhat less stout, with about twelve joints, of which the 

 first two or three are not quite so long as broad, the following squarish, 

 becoming rather longer than broad distally; distally the pinnules slowly 

 increase in length and become more slender; the distal pinnules are 6mm. 

 long, moderately slender, with about twenty joints, the first not so long 

 as broad, the. second squarish, the following becoming gradually longer, 

 reaching a length of about twice the breadth distally. 



Color (in spirits). — Dull flesh-color, the perisome brown. 



•Type locality. — Japan. 



Type, in the collection of the University of Copenhagen. 



riimerometra producta sp. nov. 



Centro-dorsal low-hemispherical, almost discoidal, bearing cirri in two 

 crowded alternating rows; polar area moderate in size, with a raised and 

 roughened center, surrounded by one or two rows of more or less obliter- 

 ated cirrus sockets. 



Cirri xvi, 24-2(1, 15mm. long, slender; first three joints very short, 

 fourth not quite twice as broad as long, fifth to eighth half again as long 

 as broad, then decreasing in length, after the tenth or eleventh being about 

 as long as broad; ninth and following joints sharply carinate, on some of 

 the cirri bearing small sub-terminal dorsal spines; opposing spine termi- 

 nal, rather large, arising from the whole dorsal surface of the penultimate 

 joint, its anterior edge being a continuation in a straight line of the distal 

 edge of the penultimate joint; terminal claw somewhat longer than the 

 penultimate joint, rather slender, moderately curved. 



Radials short, their dorsal sides parallel to the dorso ventral axis of the 

 animal ; first costals very short, four or five times as broad as long; costal 

 axillaries broadly pentagonal, rather over twice as broad as long, rising 

 to a slight, smooth, rounded tubercle with the first costal; three distichal 

 series present in the type, all 4 (3+4)- Thirteen arms 50mm. long; first 

 two brachials wedge-shaped; next six oblong, three or four times as broad 

 as long, then short wedge-shaped, becoming oblong again and very short 

 after about the middle of the arm. 



Pj slender, flagellate distally, 5mm. long, with seventeen to twenty 

 joints, the first not so long as broad, the second to the fifth squarish, then 

 becoming elongated, and about twice as long as broad distally; the first 

 seven or eight joints somewhat carinate; I\ similar to 1\, "nun. long; 

 the distal joints are somewhat longer, and the carination of the lower 

 joints is more marked; in addition to the dorsal carination there is a lat- 

 eral carination (only slightly marked on 1', ) especially evident toward 



