﻿MARSHALL ISLANDS ECHINODERMS — CLARK 267 



Family MARIAMETRIDAE 

 Genus STEPHANOMETRA A. H. Clark 



STEPHANOMETRA INDICA PROTECTUS (Lutkcn) 



Antedon protecius Lutken, Mus. GodelTroy Cat., vol. 5, p. 190, 1874 (Tonga 

 Islands; nonien nudum) ; in P. II. Cakpenter, Trans. Linn. Soc. (Zool.), ser. 

 2, vol. 2, p. 19, 1897 (character of the oral pinnules). 



Localities. — Rongerik Atoll; Latoback Island; Bayer, Zimmerman^ 

 and Morrison, August 18, 20, 21, 1917 ; shallow water, the only depth 

 given being 5 feet. Seven specimens, U.S.N.M. Nos. E. 7232-E. 7235, 

 E. 7240, E. 7241. 



Rongelap Atoll ; on a coral head on the sandy bottom of the lagoon 

 off the center of Tufa Island; 10 feet; Morrison, July 18, 1946. One 

 large specimen, U.S.N.M. No. E. 7559. 



Class ECHINOIDEA 



Family CIDARIDAE 



Genus EUCIDARIS Pomel 



EUCroARIS METULARIA (Lamarck) 



Cidarites metularia Lamabck, Histoire naturelle des animnux sans vertebres, 

 vol. 3, p. 56, 1816 (Ocean of the Great Indies, Mauritius, and Santo Domingo). 



Localities.— E'±m\ Atoll ; 200-290 feet ; August 6, 1947. One small 

 specimen, U.S.N.M. No. E. 7341. 



Bikini Atoll; seaward side of Bikini Island; 150-275 feet; August 

 7, 1947. Two worn spines, slightly fusiform, the longest 31 mm. long, 

 U.S.N.M. No. E. 7375. 



Bikini Atoll; 800-900 feet; August 7, 1947. One small spine, 

 slightly fusiform, 15 mm. long, U.S.N.M. No. E. 7376. 



Bikini Atoll ; Namu Island ; outside reef ; Johnson, April 4, 1946. 

 One specimen, U.S.N.M. No. E. 7609. 



Eniwetok Atoll ; lagoon ; Bogon Island, intertidal ; Johnson, June 1, 

 1946. One specimen, U.S.N.M. No. E. 7614. 



Rongerik Atoll; Rongerik Island; under rock in shallow water; 

 Whitaker, August 20, 1947. One specimen, U.S.N.M. No. E. 7242. 



Genus CHONDROCIDARIS A. Agassiz 



CHONDROCIDARIS GIGANTEA A. Agassiz 



Chondrocidaris gigantca A. Agassiz, Bull. IMus. Comp. Zool., vol. 1, No. 2, p. 18, 

 1863 (Hawaiian Islands). 



Locality.— Bikini Atoll ; 800-900 feet ; August 7, 1947. A perfectly 

 clean subambital spine, U.S.N.M. No. E. 7372. 



Notes. — This spine agrees fairly well with some of the subambital 



