NO. 1798. CRIN0ID8 COLLECTED BY THE ALBATROSS— CLARK. 561 



than exteriorly, about as broad as the median length, with the distal 

 edge very strongly everted and the syzygial line raised into a sharp 

 ridge; next three brachials slightly wedge-shaped, twice as broad as 

 the median length, the distal edges very strongly everted, then becom- 

 ing very obliquely wedge-shaped, almost triangular, about as long as 

 broad, with the distal edges strongly produced and serrate, and after 

 the second syzygy longer than broad, gradually decreasing in obliquity 

 and increasing in length distally so that the outer brachials are twice 

 as long as broad; the production of the distal edges of the brachials 

 becomes rather less marked after the proximal fourth of the arm. 

 but persists to the tip. 



Syzygies occur between the third and fourth brachials, again 

 between the ninth and tenth and fourteenth and fifteenth, and dis- 

 tally at intervals of three oblique muscular articulations. 



Pj 4.5 mm. long, slender, rather stiff, evenly tapering to a pointed 

 tip, with twelve segments, the first about twice as broad as long, 

 the second and third about as broad as long or slightly longer, the 

 following increasing in length, the distal being about three times as 

 long as broad; Pg 6 mm. long, similar to P^ but proportionately 

 stouter, with about fourteen segments, the distal rather more elon- 

 gated than those of P^; P3 7 mm. to 7.5 mm. long, similar to Pj, but pro- 

 portionately stouter, with seventeen segments, the outer with slightly 

 produced distal ends; P4 6.5 mm. long, about as stout basally as P3 

 but more slender distally, the outer segments with more prominent 

 distal ends; P5 5 mm. long, nearly as stout basally as P4, but more 

 slender distally and with longer segments; following pinnules similar 

 to P5, gradually becoming longer and more slender; the distal pin- 

 nules are 6 mm. long. 



The color is brownish yellow, with the perisome dark brown. 



Type.— C&t. No. 27507, U.S.N.M., from station 5519. 



Three additional specimens were secured at this station; one has 

 the arms 70 mm. long and the cirri XVII, 9-10, 6 mm. long; another 

 has the arms 75 mm. long and the cirri XIX, 9-12, 7 mm. long; and 

 the third has the arms 65 mm. long and the cirri XIX, 10-11. 



Station 5536. — One specimen with arms 55 mm. long and cirri 

 XXIX, 10-12, 5 mm. long. 



Subfamily PEItOM:KTRIN"^E. 

 Genus PEROMETRA. 



PEROMETRA PUSILLA (P. H. Carpenter). 



In the Challenger report Carpenter described, under the name of 

 Antedon pusilla, a small comatulid from near the Ki Islands; he 

 referred this species to his " Basicurva group," of which, together 

 with his Antedon denticulata, it formed a section distinguished by the 

 absence of ambulacral plating from all the other species. 

 Proc. N. M. vol. 39—10 38 



