only a single socket, consists of two, with in two cases a more or less developed third • of 

 the onter columns six contain three sockets, two four, and two two. 



Two cirri are preserved, one whole and one with a broken tip. These are 55 mm. lom-- 

 and consist of 29 segments of which the 

 first is very short, the second about twice 

 as broad as long, the third slightly longer 

 than broad, the fourth about twice as 

 long as the diameter of the distal end, 

 the fifth nearly or quite three times as 

 long as the distal diameter in lateral 

 view, and the sixth-ninth or -tenth slightly 

 loncjer than the fifth ; the followino- seg- 

 ments decrease almost imperceptibly in 

 length so that the nineteenth and fol- 

 lowing are about twice as broad as long; 

 from the twentythird segment the cirrus 



J ö Fig. 12. 



tapers CÜStaJly tO a Very Slencler tip, and Lateral view of the proximal portion of a specimen of Psathyrometra m 



the segments increase in proportionate from Stat ' 45 - About twice natural size - (Courtesy of the as - Nat!onal Museum > 

 length so that the last preserved is five or six times as long as broad ; from the third onward 

 the segments in lateral view are gently concave both dorsally and ventrally, so that the arti- 

 culations are prominent, but this decreases and disappears in the relatively short distal segments. 

 The cirri are moderately compressed laterally throughout their entire length, and resemble 

 those of the species of Pentametrocrinus and Thaumatocrinus. 



The post-radial series resemble those of Ps. mira ; the distance from the radial • to the 

 first syzygy is 8.0 mm. 



The "Investigator" dredged this species at Stat. 115 in the Andaman Sea (1 1° 3i'4o" X., 

 02°46'o6"E) in 338 — 396 Metres, on green mud; the bottom temperature was I3°.3 C. 



7. Psathyromcira mira A. H. Clark. 



A. H. CLARK. Proc. U.S. National Museum, vol. 36, 1909, p. 648 (Psathyrometra mira). 



Proc. Biol. Soc. Washington, vol. 22, 1909, p. 149 (Psathyrometra mira). 



Records of the Indian Museum, vol. 7, 1912, part 3, N° 26, p. 270 (Psathyrometra mira). 



Crinoids of the Indian Ocean, 191 2, p. 235, fig. 43, p. 235 {Psathyrometra mira). 



Stat. 45. 7°24'S., u8°i5'.2E. Flores Sea. 794 Metres. 1 Ex-. 

 Stat. 170. 3°37'.7S., I3I°26'.4E. Ceram Sea. 924 Metres. 1 Ex. 



The specimen from Stat. 45 has the centrodorsal relatively slightly longer than that 

 of the type specimen, though it agrees exactly in all other particulars; it is 4.0 mm. in diameter 

 at the base and 4.25 mm. from the apex to the interradial border. 



Pj is 10 mm. long, composed of 22 segments, at first short, becoming about as long 

 as broad on the eighth, and twice or three times as long as broad terminally ; the short 

 earlier segments have their corners cut away as in Heliometra glacialis\ the pinnule is slender, 



