46 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
with a stout dentiform spine directed forward, and above bears a slen. 
der spiniform appendage curved slightly upward and outward, anda 
little longer than the fourth segment ; the third segment projects below 
the fourth segment in a slender spiniform process reaching by the 
fourth segment; the fourth segment is nearly as long as the diamete 
of the eye, beyond which it reaches considerably, and is armed at the 
distal end by a long spine projecting beneath and beyond the ultimate 
segment, and above and on the outer side by two smail teeth; the ulti- 
mate segment is little more than half as long as the fourth, about once 
and a half as long as broad, and armed at the distal end with three 
long and approximately equal and equidistant spines. The flagellum 
is nearly as long as the whole body, slender, slightly compressed verti- 
cally, sparsely armed with minute sete, and, at long intervals, with 
a few very long and slender sete. 
The mandibles and maxille are very nearly as in Munida Bamffia, 
but the proximal lobe of the protognath of the first maxilla is broader 
and less prolonged and more obtusely rounded anteriorly. 
The proximal lobe of the protopod of the first maxilliped projects 
very little anteriorly, and the distal lobe is fully twice as long as broad. 
The endopod projects considerably beyond the protopod, is less curved 
than in Munida Lamffia, searcely at all tapered distally, and clothed 
with slender sete along the inner edge and at the obtuse tip. The 
basal portion of the exopod is longer than the endopod, from a sixth to 
an eighth as broad as long, sparsely setigerous along the edges, and 
bears a slender flagellum slightly less than half as long as the basal 
part, and obscurely multiarticulate distally. The epipod is small, about 
half as long as the endopod, tapered to the tip, and setigerous distally. 
The second maxilliped resembles closely that of Munida Bamffia, but 
the endopod is shorter and stouter, the merus being scarcely more than 
twice as long as broad, and the basal part of the exopod is a little 
shorter, scarcely narrowed distally, and somewhat less setigerous. 
The ischium and merus in the external maxilliped are approximately 
equal in length, the ischium unarmed at the distal end, but with the 
inner angle dentate as usual; the merus is only very slightly expanded 
on the inner side, and bears only a small spine near the distal end; the 
propodus is narrow, with a very slight expansion on the inner side; and 
the dactyius is considerably smaller than the propodus, and subeylin. 
drical. The basal part of the exopod does not reach the distal end of 
the merus. There are no maxillipedal arthrobranchie, as there are in 
the species of Munida. 
The chelipeds are not far from three times as long as the carapax, 
including the rostrum, and are apparently not much shorter propor- 
tionally in the females and young than in the adult males. The merus 
is subcylindrieal, considerably longer than the carapax, including the 
rostrum, and is armed with four longitudinal series of spines, of which 
those forming the two series on the inner side are much larger than 
