R. DOUGLAS LAURIE—BRACHYURA. 465 
Family PINNOTHERID A. 
Genus OstracoTHERES, H. Milne-Edwards, 1853. 
Original orthography Ostracotheres, not Ostracoteres ; see H. Milne-Edwards, 1853, p. 219. 
56. OSTRACOTHERES CYNTHIA, Nobili, 1905. (PI. 45. figs. 3-36.) See 
Nobili, 1906, p. 301. 
Ostracoteres cynthia, Nobili, loc. cit. 
Locality. No locality given, 1 g [390]. 
Remarks. After characterising the species from a ? example by pointing 
out that, among other things, its carapace is quadrangular rather than 
globular and that the dactylus of the last walking-leg is long, flattened, 
hairy, and has a sinuous margin, Nobili adds that in the ¢ the carapace is 
more rounded and the dactylus of the last walking-leg differs little from 
those of the others. 
In the present specimen the carapace is almost, though not altogether, 
circular, with the posterior border convex. It is seen under a lens to be 
faintly pitted and to bear a few scattered very short inconspicuous setee. 
The deflexed anterior obtusely pointed tip of the front is only seen in an 
anterior view of the animal. 
The distal end of the propodite of the third maxillipede differs from 
Nobili’s description and figure, for, instead of being obliquely truncated, it is 
the same width distally as elsewhere and its distal margin is concave. The 
form of this appendage is important in species of Ostracotheres. 
Ostracotheres cynthie. External maxillipede, g 390. 
Cheliped stout, half as long again as the carapace (1°58 C.1.), a little longer 
than walking-leg 1 (1:07 length of W.L. 1); wrist swollen; hand with 
lower outer border strongly marked posteriorly, producing a triangular 
LINN. JOURN,— ZOOLOGY, VOL. XXXI, 36 
