﻿MARSHALL ISLANDS ECHINODERMS — CLARK 275 



Eniwetok Atoll; Pujiyoru Island, outer reef flats; Morrison, June 

 2, 1940. One specimen, U.S.N.M. No. E. 7544. 



Ronfjerik Atoll; Bock Island, outer reef; Bayer and Zinimei-man, 

 AuiTUst 19, 1947. One specimen. 



Note. — One of the specimens from Namu Island is at the bottom of 

 a cylindrical hole with perfectly smooth sides, 80 mm. deep and 30 mm. 

 in diameter (E. 7368). 



Genus HETEROCENTROTUS Brandt 



HETEROCENTROTUS TRIGONARIUS (Lamarck) 



Echinus trigonarius Lamarck, Histoire naturelle des animaiix sans vertebres, 

 vol. 3, p. 51, 1816 (?Mediterranean). 



Localities. — Bikini Atoll; reef off the southeast corner of Bikini 

 Island; Morrison, March 7, 1946. Four specimens, U.S.N.M. Nos. 

 E. 7007, E. 7008, E. 7533. 



Bikini Atoll ; outer reef, southern end of Bikini Island ; Morrison, 

 July 3, 1946. One specimen, U.S.N.M. No. E. 7534. 



Bikini Atoll; Enyu Island, southeast corner, outer reef; Monison, 

 March 16, 1946. Five specimens, U.S.N.M. No. E. 6988. 



Bikini Atoll; Namu Island, edge of outer reef; Morrison, April 4, 

 1946. Three specimens, U.S.N.M. Nos. E. 6992, E. 6993. 



Bikini Atoll; Bikini Island, outer reef opposite the center of the 

 island; Ladd, April 17, 1946. One specimen, U.S.N.M. No. E. 6991. 



Bikini Atoll ; Bikini Island, edge of reef opposite the east central 

 part of the island; Morrison, April 18, 1946. Two specimens, 

 U.S.N.M., No. E. 6989. 



Bikini Atoll; Enyu Island, outer reef, south point of the island; 

 Bayer, August 1, 1947. Two specimens, U.S.N.M., Nos. E. 7183, 

 E. 7184. 



Bikini Atoll; Namu Island, outer reef; Morrison, August 7, 1947. 

 One specimen, U.S.N.M., No. E. 7207. 



Bikini Atoll; Namu Island, outer reef; Bayer, August 25, 1947. 

 Two specimens, U.S.N.M., Nos. E. 7179, E. 7180. 



Eniwetok Atoll ; Ziesenhenne, February 1, 2, 1946. One specimen, 

 U.S.N.M.. No. E. 7283. 



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

 1946. Two specimens, U.S.N.M., Nos. E. 7967, E. 7968. 



Eniwetok Atoll; Pujiyoru Island, ocean reef; Morrison, June 2, 

 1946. Two specimens, U.S.N.M.. Nos. E. 7965, E. 7966. 



Eniwetok Atoll ; flats on east side near south end of Eniwetok Island ; 

 Morrison, May 20, 1946. One specimen, U.S.N.M., No. E. 7535. 



Eniwetok Island; Grinem Island, outer reef on southwest side; 

 Morrison, May 29, 1946. Seven specimens, U.S.N.M., Nos. E. 6990, 

 E. 6994. 



