2 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
GENERIC CHARACTERS.—Only a few additions need to be added to 
Poulsen’s diagnosis of the genus (1962, pp. 359-361) to include the 
new species described herein. 
Shell hingement of the genus was not discussed by Poulsen. Fu- 
philomedes arostrata bears a tripartite hinge with strongly sclerotized 
posterior elements. Whether this character is present in all members | 
of the genus is not known. Muscle scars consist of numerous oval 
or polygonal individual muscle scars located near, or anterior to, the: 
middle of each valve. 
Second antenna: Basal spines are not always present on exopodite. 
They are not present on EH. arostrata and were also reported to be 
absent on Huphilomedes oblonga (Juday, 1907, p. 145) and EHuphilo- 
medes multichelata (Kornicker, 1959, p. 230). 
Sixth limb: The end joint of FE. arostrata is unusual because it is 
not produced posteriorly. 
Frontal organ: Not noticeably widened at middle and with some 
surface spines near tip on appendage of male of FE. arostrata. Surface 
spines also were reported on Huphilomedes polae (Graf, 1931, p. 37, 
fie): 
OccuRRENCE.—Species of Huwphilomedes have been reported from 
subtropical, tropical, and warm temperate regions (Poulsen, 1962, p. 
359). The new species is the second reported from the Indian Ocean. 
Euphilomedes debilis (Brady, 1902) was previously reported from 
Trincomali on the northeast coast of Ceylon facing the Bay of Bengal. 
Euphilomedes arostrata, new species 
Figures 1-10 
Hototyrr.—Gravid female described in this paper, USNM 112658 
(figs. 1-4). 
ParatypE.—Male described in this paper, USNM 112659 (figs. 
5-10). 
TyprE LocaLity.—A male and female were collected about 100 
meters apart between Imma and Hura Islands, Male Atoll, Maldive 
Islands on March 20, 1964. Specimens were in sand obtained from 
upper surface of bottom in a patch of marine grass in one-third to 
one-half meters of water. 
DiaGnosis.—Euphilomedes with four primary claws and seven to 
nine (possibly more) secondary claws. Second joint of exopodite of | 
sixth limb not produced posteriorly. Hinge of shell terminating 
posteriorly in sclerotized angular process on each valve. Shell sur- | 
face with irregular polygons and without lateral or posterior processes. — 
DESCRIPTION OF FEMALE.—Shell (figs. 1, 2): Oval in lateral view 
with greatest height near middle (fig. 14); prominent rostrum; broad 
rostral incisure, with compressed posterior edge (fig. 1c). Anterior 
