CLARK] CRINOIDS FROM THE NORTH PACIFIC OCEAN 34I 



ANTEDON MINUTA, sp. nov. 



Centro-dorsal a low hemisphere, nearly covered with about twenty 

 cirri; these are 5 mm. long, with ten to fifteen segments, all some- 

 what longer than wide, but the basal not specially longer than the 

 distal ; terminal claw rather large ; opposing spine small ; the articu- 

 lations of the cirrus segments- are prominent, and there is a slight 

 ventral overlap. 



Radials visible ; first costals oblong, about twice as wide as high ; 

 auxiliaries pentagonal, about as wide as high ; ten slender arms, 

 30 mm. long, with about fifty brachials, long-quadrate, with the 

 first seven roughly squarish ; syzygia in the third, eighth, and 

 twelfth brachials, and distally at intervals of two, sometimes three; 

 rays widely separated. 



First pinnule 3 mm. long, with about eighteen segments ; second 

 pinnule similar, but very slightly longer ; the following pinnules 

 become more slender, but do not increase much in length ; the two 

 proximal segments of the lower pinnules are enlarged, short, and 

 squarish, the rest somewhat longer than wide, although not espe- 

 cially elongated. 



Color (in spirits) pinkish, light brownish, or dull white, with the 

 pinnules brown. 



Type— Catalogue No. 22,661, U. S. N. M. ; from Albatross Sta- 

 tion No. 3725, off the southern coast of Hondo, Japan; 13 fathoms. 



This species is more closely related to Antcdon briseis, from 

 which, however, it is readily distinguishable by having the rays well 

 separated, with no lateral projections, and the lower pinnules com- 

 posed of short segments. It is also a much smaller species. 



ANTEDON ORIENTALIS, sp. nov. 



Centro-dorsal low T -conical, bearing thirty to fifty cirri, almost none 

 of the pole bare; cirri 13 mm. long, slender, with thirty to thirty- 

 five segments, the proximal two-thirds or more of which are some- 

 what longer than wide, the distal becoming short ; the longer seg- 

 ments are more or less "dice-box shaped," and the distal are strongly 

 carinate dorsally; the two or three apical ("small mature") cirri are 

 3 or 4 mm. long, very slender and delicate, with twelve to fifteen 

 elongated segments, much constricted centrally ; opposing soine well 

 developed. 



Radials short, crescentic ; first costals short, about three times as 

 wide as long, with lateral dentate processes, and in apposition later- 

 ally; axillaries triangular, slightly wider than high, free laterally; 



