﻿276 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



Eniwetok Atoll; Lidilbiit Island, near outer reef edge; Morrison, 

 May 1, 1946. Two small specimens, U.S.N.M., No. E. 7557. 



Eongelap Atoll; 2 miles west of Busch Island; 120 feet; Taylor, 

 June 21, 1946. One small dead test, U.S.N.M., No. E. 7564. 



Eongelap Atoll; Kabelle Island; lithothamnion ridge, intertidal; 

 Johnson, July 28, 1946. One small specimen, U.S.N.M., No. E. 7603. 



Johnston Island; outer reef edge, northwest side; Bayer, August 

 28, 29, 1947. Two specimens, U.S.N.M., Nos. E. 7181, E. 7182. 



HETEROCENTROTUS MAMMILLATUS (Linne) 



Echinus mamillatus Linne, Systeina naturae, ed. 10, vol. 1, p. 664, No. 9, 1758 (no 

 locality). 



Localities. — Johnston Island; through David Starr Jordan. One 

 specimen, U.S.N.M., No. E. 5949. 



Johnston Island, outer reef edge on the northwest side of the island ; 

 Bayer, August 28, 1947. Twenty-four specimens, U.S.N.M., Nos. 

 E. 7185-E. 7206, E. 7237, E. 7316. 



Family CLYPEASTRIDAE 



Genus CLYPEASTER Lamarck 



CLYPEASTER RETICULATUS (Linne) 



Echinus reticulatus Linne, Systema naturae, ed. 10, vol. 1, p. 666, No. 15, 1758 

 (American Ocean). 



Locality. — Bikini Atoll; Bikini Island; 150-265 feet; August 7, 

 1947. One specimen, U.S.N.M. No. E. 7262. 



Family LAGANIDAE 

 Genus LAGANUM Linck 



LAGANUM DEPRESSUM L. Agassiz 



Laganum depressum L. Agassiz, Monographie des Scutellidae, p. 110, pi. 23, figs. 

 1-7, 1841 (Moluccas). 



Localities. — Bikini Atoll; about one-fourth mile southwest of the 

 southeast point of Bikini Island ; 21 feet ; sandy bottom with Forami- 

 nifera; Morrison, April 25, 1946. Thirty-two specimens, U.S.N.M., 

 Nos. E. 7505, E. 7508, E. 7294. 



Bikini Atoll ; one-third of a mile southwest of the southeast point 

 of Bikini Island; 21 feet; Morrison, April 25, 1946. Three speci- 

 mens, U.S.N.M., No. E. 7291. 



Bikini Atoll; one-third of a mile west of the southeast point of 

 Bikini Island ; 24 feet ; sandy bottom ; Morrison, April 23, 1946. Two 

 specimens, U.S.N.M., No. E. 7607. 



Bikini Atoll ; one-third of a mile southwest of the southeast point 

 of Bikini Island; 27 feet; sandy bottom; Morrison, April 25, 1946. 

 Five specimens, U.S.N.M., Nos. E. 7510, E. 7577. 



