﻿MARSHALL ISLANDS ECHINODERMS — CLARK 271 



Notes — The specimen is a bare test 9 mm. in diameter and 4 mm. high. 

 The sculpture is strongly marked. The color is bright orange red 

 fading to white on the oral surface. The region around the periproct 

 is white, the white color running in a broad wedge down the 

 interambulacral areas about halfway to the ambitus, and in narrower 

 wedges about two-thirds as far down the midambulacral areas. There 

 is a yellow-green spot in the middle of each genital. The interior of 

 the test is white with a tapering red stripe running along each outer 

 border of the interambulacral areas as far as the coronal ring. The 

 lower half of the test is lighter and mottled red. 



Family TOXOPNEUSTIDAE 

 Genus CYRTECHINUS Mortensen 



CYRTECHINUS VEKRUCULATUS (Lutken) 



Psammecliinus ven-uculatus Lutken, Vid. Medd. Natiirli. Foren. K0beiihavn, 

 1S64, p. 166, 1865. 



Localities. — Bikini Atoll; lagoon; 180-200 feet; Schultz, March 

 29, 1946. One specimen, U.S.N.M. No. E. 7286. 



Bikini Atoll ; in the lagoon, dredged about 3 miles off Bikini Island; 

 150 feet; Halimeda bottom; Morrison, July 11, 1946. Six specimens, 

 U.S.N.M. No. E. 7300. 



Bikini Atoll ; lagoon ; Morrison, August 26, 1947. Seven specimens, 

 U.S.N.M. No. E. 7275. 



Rongelap Atoll ; lagoon ; 23 + fathoms ; Johnson, June 16, 1946. 

 One specimen, U.S.N.M. No. E. 7606. 



Genus TRIPNEUSTES L. Agassiz 



TRIPNEUSTES GRATILLA (Linne) 



EcfUnvs gratilla Linne, Systema naturae, ed. 10, voL 1, p. 664, No. 4, 1758 

 (Indian Ocean). 



Localities. — Eniwetok Atoll ; Ziesenhenne, February 1, 2, 1946. One 

 specimen, U.S.N.M. No. E. 7282. 



Eniwetok Atoll ; Arambiru Island, ocean reef; Schultz, June 3, 1946. 

 Fifteen specimens, U.S.N.M. Nos. E. 7971, E. 7972. 



Eniwetok Atoll ; East Rigili Island ; Morrison, May 30, 1946. One 

 specimen, U.S.N.M. No. E. 6998. 



Eniwetok Atoll; Pujiyoru Island, ocean reef; Morrison and Cali, 

 June 2, 1946. Eleven specimens, U.S.N.M. No. E. 7308. 



Johnston Island ; through Dr. David Starr Jordan. One specimen, 

 U.S.N.M. No. 5948. 



Johnston Island, outer reef ; Bayer, August 28, 1947. Three speci- 

 mens, U.S.N.M. No. E. 7390. 



