94 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
species of Conolampas in the Philippine seas, the genus Conolampas, 
hitherto known to occur only in the West Indies. (The fact that I took 
another species of Conolampas at the Kei Islands in 1922 and that the 
Murray Expedition took a third species in the Indian Ocean gives quite 
a new conception of this fine echinolampadid and its geographical 
distribution.) Of considerable interest is likewise the discovery of a 
fine new Pericosmus, P. melanostomus. This genus was hitherto 
thought to be extinct, until the Jnvestigator discovered a species, 
P. macronesius Koehler, in the Indian Ocean; but the discovery of this 
new species, together with Crossland’s find of a fine large species, 
Pericosmus akabanus Mortensen, in the Red Sea and my own discovery 
of several more species (to be described in volume 5 of my Monograph 
of the Echinoidea), proves this genus to be still living in full vigor. 
A notable fact is the strong development of the genus Brissopsis in 
the Philippine seas, no less than five species being taken by the Aloa- 
tross, which means that six species occur there, one of them, the very 
common Brissopsis luzonica, having curiously enough not been taken 
at the Philippines by the Albatross. The absence of such interesting 
forms as Aéropsis, Aceste, and Pourtalesia is regrettable, but this is 
balanced by the presence of several specimens of a new Plesiozonus 
(though in a very poor condition). 
On the whole this collection of echinoids from the Philippine seas 
is very rich and compares favorably with the collection of the Siboga 
Expedition. These two expeditions, combined with my own re- 
searches at the Kei Islands (1922) and in the Bali Sea (1928), have 
given the proof that the Malay Region, of which the Philippines form 
an integral part, is, together with the Japanese seas, particularly the 
Sagami Sea, the richest in the world in echinoids (and apparently also 
in the other classes of echinoderms), as were the then European seas 
in Jurassic and Cretaceous times. 
Order HOLECTYPOIDA 
Family ECHINONEIDAE 
Genus ECHINONEUS Leske 
ECHINONEUS CYCLOSTOMUS Leske 
Echinoneus cyclostomus A. AcaAssiz, Revision of the Echini [Mem. Mus. Comp. 
Zool., vol. 3], pp. 117, 550, pl. 14, figs. 6-8; pl. 14a, figs. 5-10, 1873.—WeEsTER- 
GREN, Mem. Mus. Comp. Zool, vol. 39, No. 2, p. 44, 1911.—H. L. Cuiark, 
Hawaiian and other Pacific Echini: Echinoneidae ... Spatangidae, p. 147, 
1917; Catalogue of the Recent sea-urchins in the British Museum, p. 177, 
1925. 
Locality.—Station 5143; off Jol6é Light (lat. 6°05’50’" N., long. 
121°02’15”’ E.) ; 835 meters; February 15, 1908. One small dead test. 
