

10 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



The disk is brownish, becoming dark in the center and in the inter- 

 radial areas, with numerous small whitish spots, and in the central 

 portion fine parallel radiating whitish lines. The arms above are 

 slaty black with pairs of white spots, each the length of an upper arm 

 plate in diameter, spaced somewhat unequally at intervals of 4-7 upper 

 arm plates ; in the outer half of the arms these spots fuse to form nar- 

 row bands which in width are equal to from 1 to 2 upper arm plates. 

 The arm spines in the basal portion of the arms are tipped with white. 

 Beneath, the arms are dark gray and the interradial areas black. 



Note. — Another specimen from the same locality has the disk 



1 1 mm. in diameter and the arms 75 mm. long. 



Locality. — Galapagos Islands : Elizabeth Bay, Albemarle Island ; 

 south end of the black beach north of the mangroves north of the two 

 "red" islands. Two specimens (cotypes, U.S.N.M. no. E.5618). 



Note. — It gives me great pleasure to name this species for Presi- 

 dent Franklin D. Roosevelt, in grateful appreciation of his kindness 

 and generosity in obtaining for the United States National Museum 

 this unusually interesting collection of echinoderms. 



Remarks. — Liitken and Mortensen (Mem. Mus. Comp. Z06L, vol. 

 2$, No. 2, p. 162, pi. 13, fig. 12, 1899) recorded and figured a single 

 arm of a large species of Ophionereis from the Galapagos Islands {Al- 

 batross station 3405, 53 fathoms) with very broad upper arm plates 

 and very small supplementary plates. These features appear to indi- 

 cate, according to them, that the species represented by the arm is 

 undescribed. Their figure shows that it cannot be referred to O. 

 rooseveltl; the upper arm plates are much broader and the supple- 

 mentary plates are much smaller; the color, also, is wholly different. 



OPHIODERMA APPRESSA (Say) 



Locality. — Old Providence Island, 120 miles east of the Mosquito 

 Coast (lat. i3°2i' N., long. 8i°22' W.) ; shore; reef and tide-pool 

 collecting; August i, 1938. Three specimens (U.S.N.M. no. E5607). 



ASTEROIDEA 

 ECHINASTER PARVISPINUS A. H. Clark 



Locality. — Lower California: Magdalena Bay, inside the northern 

 point of the entrance to bay, between Belcher Point and the anchor- 

 age ; 10-15 fathoms (18-27 m.) ; sandy and weedy bottom; July 18, 

 1938. Three specimens (U.S.N.M. no. E.5610). 



Note. — In these three specimens r = 33 mm. 



