Packard.] 
210 
[April 3, 
lar in outline. The second joint is long, with the inner angle armed 
with short stout spines, of which there are seven of equal size on 
the distal half of the joint. The third joint is also provided with 
similar spines, but the joint is only half as long as the second and 
somewhat slenderer. No spines are to be seen on the rest of the 
leg and the remaining joints are so fractured and ill preserved 
as not to present good characters, though the remainder of the 
limb is evidently as long as the three basal joints taken together ; 
and though the joints are broken and their outline is indistinct, it 
is evident that the appendage did not end in a large chela, as in 
the Astacidae or Carididae, but probably in a not very long band, 
jio thicker than the second joint of the limb. 
The second pair of legs are nearly as large as the first, but only 
the three basal joints are preserved ; they are like the first pair, 
triquetral and spined, and the second joint is of the same shape and 
size as the corresponding joint of the first pair of legs. The third, 
fourth and fifth legs are a little more than half as thick as the first 
pair, with the three basal joints preserved ; they are flattened cy- 
lindical rather than triangular in transverse section. Unfortunately 
the terminal joints are not preserved, so that we are unable to say 
whether the four hinder pairs of feet ended in claws, or were sim- 
ple. 
The carapace is imperfectly preserved, being partly shattered, 
so as not to show the characteristic shape ; but a large proportion 
is preserved, and it looks at first sight like the carapace of a crab, 
such as that of a species of Cancer, but without the regional marks 
characteristic of the shields of Bracliyura. One side is partly pre- 
served ; the surface is slightly convex and coarsely but uniformly 
pitted. 
Whole length of the specimen including the legs and carapace 48 
mm. Length of the first pair of legs, 25 mm. ; of second joint, 
8 mm., thickness of second joint, 2.3 mm. ; length of third joint, 
3.2 mm. 
The fossil does not apparently belong to the Garididce , as the 
body of this crustracean was probably not laterally compressed while 
the carapace was quite solid, without a median ridge, neither pro- 
longed into a long rostrum. It cannot be referred to the Astacidoe 
on account of the lack of large chelae and of the well-marked regions 
of the carapace, the transverse and two median creases wanting. 
The form is excluded from the Loricata , or Palinuridae, by the less 
