252 
PACIFIC SCIENCE, Vol. VIII, July, 1954 
South Loi Islands, F. S. MacNeil (1 spec- 
imen) ; Ujae Atoll, Wotya Island, F. S. Mac- 
Neil (1 small specimen); Ujelang Atoll, sand 
bar east of Moron Island, F. S. MacNeil (1 
specimen). 
Genus Colobocentrotus Brandt 
Colobocentrotus atratus (Linne) 
Echinus atratus Linne, Systema naturae, ed. 
10, vol. 1, p. 655, 1758. 
LOCALITY: Spouting Horn, south shore of 
Kauai, Hawaiian Islands, P. E. Cloud, Jr., 
September 13, 1951 (25 specimens). 
Colobocentrotus pedifer (de Blainville) 
Echinus pedifer de Blainville, Diet, de sci. nat., 
vol. 37, Oursin, p. 97, 1825 (southern 
seas). 
localities; Tuamotus, Morrison, 1922 (1 
specimen); 1959 (1 specimen); 2043 (7 spec- 
imens); 2050 (5 specimens). 
note: This species is known only from the 
Tuamotus. 
Colobocentrotus mertensi Brandt 
Colobocentrotus mertensiE>s 2 a\dx, Prodrom. descr. 
anim. ab H. Mertensio observ., p. 66, 1835. 
localities: Guam, Oca Point, David H. 
Johnson, May, 1945 (8 specimens). 
Saipan, near Taloforo, Alice Davis and 
Betsy Weld, transmitted through P. E. Cloud, 
Jr., June 12, 1949 (49 specimens). 
NOTES: This species, long known from the 
Bonin Islands, was first recorded from the 
Marianas by Shozo Nishiyama who listed it 
from Pagan Island (Japan Oceanogr. Soc., 
Jour. 1[1,2], May, 1942 [in Japanese]). In 
1949 I mentioned its occurrence at Guam 
(A. H. Clark, 1949; 71). 
Genus Heterocentrotus Brandt 
Heterocentrotus trigonarius (Lamarck) 
Echinus trigonarius Lamarck, Histoire naturelle 
des animaux sans vertebres, vol. 3, p. 51, 
1816 (.^Mediterranean). 
localities: Marshall Islands, Ailuk, F. S. 
MacNeil (1 specimen); Kwajalein Atoll, Loi 
and South Loi Islands, F. S. MacNeil (1 spec- 
imen) ; Lea Atoll, on windward reef flat. Lea 
Island, F. S. MacNeil, 1951-52 (1 specimen); 
Likiep Atoll, Lado Island, outer reef behind 
lithothamnion ridge, F. S. MacNeil (2 spec- 
imens); Uterik Atoll, Uterik Island, F. S. 
MacNeil (2 specimens); Wotho, F. S. Mac- 
Neil (2 specimens). 
Tuamotus, Morrison, 1855 (4 specimens); 
1889 (1 specimen); 1959 (1 small specimen). 
Canton Island, Charles A. Ely, November 
18, 1941 (1 specimen). 
Guam, Oca Point, David H. Johnson, May, 
1945 (2 specimens). 
Heterocentrotus mammillatus (Linne) 
Echinus mamillatus Linne, Systema naturae, ed. 
10, vol. 1, p. 664, No. 9, 1758 (no locality). 
LOCALITIES: Tuamotus, Morrison, 1959 (3 
small specimens). 
Saipan, near Taloforo, P. E. Cloud, Jr., 
June 12, 1949 (2 specimens). 
New Caledonia (8 bare tests). 
Family CLYPEASTRIDAE 
Genus Clypeaster Lamarck 
Clypeaster latissimus (Lamarck) 
Scutella latissima Lamarck, Histoire naturelle 
des animaux sans vertebres, vol. 3, p. 12, 
, 1816 (.^Southern Ocean). 
LOCALITY: New Caledonia (1 specimen, 110 
by 104 mm.). 
Clypeaster reticulatus (Linne) 
Echinus reticulatus Linne, Systema naturae, ed. 
10, vol. 1, p. 606, No. 15, 1758 (American 
Ocean) . 
localities: Marshall Islands, Taka Atoll, 
F. S. MacNeil (1 specimen, length 75 mm.. 
