2l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 52 



third pinnule 10 mm. long, with fifteen joints, resembling the second; 

 fourth and following pinnules 7 mm. long, with fourteen joints, 

 the fifth and following being about as stout as the first; distal 

 pinnules 10 mm. long. 



In the specimen from the Philippine Islands, all the lower pinnules 

 have squarish joints; the first is 9 mm. long with 19 joints, the 

 second 10 mm. with 17, the third 8 mm. with 15, and the fourth 

 and following 6 mm. with 14; the distal pinnules are 10 mm. long. 



Color (in spirits). — Flesh color, the perisome brown. 



Type. — Cat. No. 25453, U. S. N. J\I., from Port Denison, near 

 Bowen, Queensland. 



A specimen was dredged at Albatross Station Xo. 5138, between 

 Jolo and Pangasinan Islands; 19 fathoms. 



This is probably the species which has been recorded from Port 

 Denison as "Antedon milberti/' but the relatively slender cirri with 

 comparatively long joints contrast sharply with the very stout cirri 

 of milberti, which have exceedingly short joints. 



HIMEROMETRA VARIIPINNA (P. H. Carpenter) 



Station Xo. 5157; west of Sunalac Island (Tataan group) ; 18 

 fathoms. 



HIMEROMETRA UNICORNIS, new species 



Centro-dorsal thick-discoidal, the small polar area deeply concave. 



Cirri xx, 30-32, stout, arranged in two closely crowded, more or 

 less alternating rows; cirrus joints remarkably uniform, all about 

 twice as broad as long, with very prominent dorsal distal ends, giv- 

 ing the cirri a strongly serrate profile dorsally; after the tenth the 

 joints bear paired dorsal tubercles. 



Radials barely visible, separated somewhat distally ; first costals 

 oblong, .short, about three times as broad as long, rounded, widely 

 separated, with a strong rounded-triangular ventro-lateral process 

 supporting the disk; costal axillaries broadly pentagonal, rather over 

 twice as broad as long, with a somewhat larger ventro-lateral pro- 

 jection than the first co.stals ; distichals and palmars 2, the latter 

 developed only on the outer side of the rays ; joints of the division 

 series and first brachials with stout ventro-lateral processes ; about 

 30 arms; first eight brachials oblong, about twice as broad as long, 

 then becoming slightly wedge-shaped about twice as broad as long, 

 gradually becoming less and less wedge-shaped and practically ob- 

 long again, about twice as broad as long in the outer half of the 

 arm. The brachials, except the discoidal proximal series, have 



