CRUSTACEA. 
123 
Fam. Ocypodidce. 
Genus Ocypode, (Fabr.) 
O. rliombea, (Fabr.) Mus. Acad. 
Two specimens, brought from the Sandwich 
Islands by Mr. J. K. Townsend. 
Fam. Macropthalmida. 
Genus Macropthalmus, (Latr). 
M. compressipes. Mus. Acad. 
Manibus compressis, transverse carinatis; testa depressa, 
transversa, margine utrinque tridentata. 
Ocular pedicles more than three-fourths as long 
as the whole width of the carapax, whose length is 
to the breadth as three to four in the males, but a 
little broader in the females ; antero-lateral margin 
with three spines, the foremost one longest; feet 
flattened and bordered with long hairs; hands 
greatly flattened, broad, and interiorly carinate on 
their external surface. Probably allied to M. cari- 
nimanus, (Latr.) 
Sandwich Islands, J. K. Townsend. 
Fam. Grapsidce. 
Genus Sesarma, (Say.) 
S. recta. Mus. Acad. 
Corp.ore quadrato, testa rugosa, antice convexa, margine 
carinata, utrinque pone oculos unidentata. 
Carapax convex before the middle, and entirely 
