Mr. C. Spence Bate on a new Genus of Macrura. 71 
in form, the distal margin as well as the upper and lower angles 
being furnished with long hairs. The propodos is rather 
shorter than the carpus, conical in form, and furnished with 
numerous stiff hairs that have their surface thickly armed 
with short sharp-pointed teeth. The dactylos is long, slender, 
and hair-like, and only differing from those hairs with which 
it mingles by being a little more robust. The basecphysis is 
long, slender, and multiarticulate, the basal joint being robust 
and cylindrical. 
The second pair of gnathopoda (¢) are about one third longer 
than the first ; the coxal joint is stout, short, and supports an 
efficient but not long podobranchial plume. The basisal 
joint is large and strong and produced beyond the ischial 
articulation to form a strong process, with which articulates 
the multiarticulate basecphysis, which resembles that of 
the first pair excepting in its relative length. The ischium 
is cylindrical, having the anterior margin smooth and the 
posterior fringed with a few simple hairs. The meros is 
longer and not quite so robust as the ischium, and fringed on 
the sides and posterior margin with a few simple hairs. The 
carpus is long and slender, having the distal extremity some- 
what stouter than the proximal, and the lower distal por- 
tion is furnished with a few hairs. The dactylos is slender 
and slightly tapering to an extremity that is armed with a 
few hairs, the more important of which are fringed with a few 
cilia. 
The first pair of pereiopoda (7) are short, feeble, and chelate ; 
the coxa is short and supports an elongate podobranchia and 
a short appendage, which I take to be the rudimentary mastigo- 
branchia. The basis is long and stout, rather broader at the 
distal than the proximal extremity, and supports a long and 
slender multiarticulate basecphysis that reaches considerably 
beyond the extremity of the dactylos. The ischium is short, 
being scarcely longer than it is broad, and fringed on the 
posterior margin with a few minute hairs. The meros is 
about three times as long as the ischium and similarly 
fringed on the posterior margin and furnished with one long 
ciliated hair on the anterior distal angle. The carpus is 
slightly longer than the meros and furnished with one ciliated 
hair on the posterior margin just behind the distal angle and 
another on the anterior distal angle; the propodos increases 
gradually to the level of the dactyloid joint, where it is 
broadest ; the pollex is produced as a simple pointed process, 
slightly swollen previously to its reaching the apex, where it 
is furnished with two small spines, and two others a little 
posteriorly on the outer margin ; two or three long and ciliated 
