﻿282 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



from the lateral apices to the anterior angle. The remaining area, 

 from the anterior angle about halfway to the posterior, and halfway 

 to the lateral apices, is covered by several much smaller plates. 



The primary spines are 2 mm. long, cylindrical or slightly tapering, 

 with eight high and rounded longitudinal ridges. In section they 

 resemble the spine of Echinolamjpas dlexandri var. sibogae figured 

 by Mortensen (Monograph of the Echinoidea, vol. 4, part 1, p. 281, 

 fig. 272, c. 1948). The secondary spines are very fine, 0.7 mm. long 

 and cylindrical. 



The ophicephalous pedicellariae resemble the one from E. a. sibogae 

 figured by Mortensen (pi. 14, figs. 5, 6). 



The color is light olive-green. The test is yellowish white with 

 some olive-green patches and a purple patch on the genitals. 



This little specimen bears a close resemblance to the young Echino- 

 lampas depressa figured by Agassiz (Revision of the Echini, pi. 16, 

 figs. 1, 2, 3, 1872), but it is much lower than is shown in figure 3, in 

 lateral view being more like the larger specimen shown in figure 10. 

 The periproctal structure is as shown in figure 14, but the three large 

 plates are smaller. 



Dr. Morrison's specimen (E. 7278) is 77 mm. long, 69 mm. in maxi- 

 mum width, 35 mm. high at the apical system, and 36 mm. high at 

 the posterior end. It agrees well with a specimen from Tavoy figured 

 and described by Koehler, but is slightly larger and more depressed. 



Dr. Schultz's specimen (E. 7279) agrees with the preceding, but is 

 somewhat smaller. 



This species has heretofore been reported only from Mauritius, 

 Ceylon, and the Bay of Bengal. 



Family SPATANGIDAE 

 Genus METALIA Gray 



METALIA DICRANA H. L. Clark 



MetaUa dicrana H. L. Clark, Mem. Mus. Comp. Zool., vol. 46, No. 2, p. 211, pi. 

 146, fig. IG, pi. 160, figs. 1-4, 1917 (Panglao, Bohol Province, Philippines). 



Localities. — Bikini Atoll; in the lagoon, about one-eighth to one- 

 fourth mile offshore inside Bokonfuaaku Island; 18-30 feet; Morri- 

 son, July 11, 1946. One specimen, U.S.N.M. No. E. 7487. 



Eniwetok Atoll ; in the lagoon, approximately 5 miles north of the 

 south anchorage, about 3 miles west of Bogen Island; 90-120 feet; 

 Taylor. Seven specimens, U.S.N.M. No. E. 7245. 



Notes. — The specimen from Bikini is 26 mm. long, 23 mm. wide, 



