120 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
conspicuous sucking disk. The fascioles very conspicuous; the peri- 
petalous fasciole not bending inward between the petals. Labrum not 
forming a prominent lip; its posterior prolongation ends off the middle 
of the second adjoining ambulacral plates, as usual in the genus. 
Globiferous pedicellariae lacking (in all the specimens available). 
Very characteristic is the presence of two sorts of ophicephalous pedi- 
cellariae, the larger with broad valves, the blade much shorter and 
usually broader than the basal part. The general color is whitish with 
a tinge of purplish, but the peristome, periproct, and the frontal tube 
feet are a very conspicuous dark purplish. 
This species apparently bears no relation to any of the fossil species 
of Pericosmus known from the Malay region. 
Genus FAORINA Gray 
FAORINA CHINENSIS Gray 
Faorina chinensis Gray, Ann. Mag. Nat. Hist., ser, 2, vol. 7, p. 182, 1851.—A. 
A«Gassiz, Revision of the Echini, p. 607, pl. 19a, figs. 4-6, 1873.—KoEHLER, 
Hchinoderma of the Indian Museum, Echinoidea, pt. 1, p. 129, pl. 18, figs. 14, 
15; pl. 19, figs. 14-24, 1914.—H. L. Ciarx, Catalogue of the Recent sea-urchins 
in the British Museum, p. 203, 1925. 
Locality.—Station 5335 (lat. 11°37’ N., long. 119°49’ E.) ; 84 meters ; 
December 18, 1908. One specimen, 59 mm. long, in rather fine state 
of preservation. 
Genus HEMIASTER Desor 
HEMIASTER EXPERGITUS var. GIBBOSUS A. Agassiz 
Hemiaster gibbosus A. AcAssiz, Challenger Echinoidea, p. 184, pl. 20, figs. 5, 16, 
22, 1881. 
Hemiaster expergitus, var. gibbosus Mortensen, Ingolf Echinoidea, vol. 2, pp. 103- 
104, 1907. 
Hemiaster expergitus H. L. CrarKk, Hawaiian and other Pacific Echini, Echi- 
noneidae. . . . Spatangidae, p. 165, 1917. 
Localities —Station 5127, Nogas Island, Sulu Sea (lat. 10°03’ N., 
long. 121°48’ E.) ; 1,753 meters; February 4, 1908. One large badly 
broken specimen. 
Station 5410, between Cebu and Leyte (lat. 10°29’ N., long. 
124°05’ E.); 705 meters; March 18, 1909. Two young specimens, 
badly broken. 
Station 5650, Gulf of Boni (lat. 4°54’ S., 121°29’ E.) ; 988 meters; 
December 17, 1909. One young specimen. 
Remarks.—The specimen from station 5127 measures 56 mm. in 
length and is the largest recorded, but whether it is also the largest 
found till now is unknown, because Clark does not say anything 
about the size of the numerous specimens taken by the Adbatross in 
the Japanese waters. The specimen was badly broken into fragments, 
