﻿274 PROCEEDINGS OF THE NATIONAL JvlUSEUM vol. 102 



Rongelap Atoll; Rongelap Island, intertidal; Johnson, July 1946. 

 One specimen, U.S.N.M. No. E. 7610. 



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

 mens, U.S.N.M. No. E. 7217. 



Note. — These specimens are all small or medium sized. The largest, 

 from the outer reef flats on the northeast side of Arambiru Island, 

 Eniwetok Atoll, is 51 mm. in length, 40 mm. broad, and 32 mm. high 

 (E. 7561). 



ECHINOMETRA MATHAEI var. OBLONGA (de Blainville) 



Echinus ohlongus de Blainville, Diet. sci. nat., vol. 37, Oursin, p. 95, 1825. 



Localities. — Bikini Atoll ; Bikini Island, from borings in coralline 

 rock at and just behind the edge of the outer reef on the southeast 

 side of the island; Morrison, April 5, 1948. Twenty-eight specimens, 

 U.S.N.M. No. E. 7001. 



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

 island ; Ladd, April 17, 1946. Three specimens, U.S.N.M. No. E. 6700. 



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

 central part; Morrison, April 18, 1946. One specimen, U.S.N.M. 

 No. E. 7002. 



Bikini Atoll; Bikini Island; Herald, July 15, 1946. Two speci- 

 mens, U.S.N.M. No. E. 7259. 



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

 May 1, 1946. Five specimens, U.S.N.M. No. E. 7568. 



Rongelap Atoll; Rongelap Island, outer reef flats; Johnson, July 

 1946. One specimen, U.S.N.M. No. E.7281. 



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

 men, U.S.N.M. No. E.7218. 



Genus ECHINOSTREPHUS A. Agassiz 



ECHINOSTREPHUS ACICULATUS A. Agassiz 



Echinostrephus aeictilatus A. Agassiz, Bull. Miis. Comp. Zool., vol. 1, p. 20, 1863 

 (Kingsmill [Gilbert] and Hawaiian Islands). 



Localities. — Bikini Atoll; Eniairo Island; Bayer, July 21, 1947. 

 One specimen, U.S.N.M. No. E. 7228. 



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

 Four specimens, two in their excavations in coral rock, U.S.N.M. Nos. 

 E. 7226, E. 7368, E. 7369. 



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

 1946. Two specimens, U.S.N.M. Nos. E. 7227, E. 7266. 



Eniwetok Atoll ; south end of Rigili Island ; Morrison, May 26, 1946. 

 One dead test, U.S.N.M. No. E. 7556. 



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

 specimen, U.S.N.M. No. E. 7529. 



