. 
48 
in two lines directed towards the front, there are distinct portions of 
calcareous matter already formed, while on the abdominal plates 
there are still more extensive calcareous pottions formed in the co- 
rium; the various groups of plates are distinctly visible, most of the 
scales are perforated, and through the holes in many cases a short 
hair or bristle protrudes. This new skin is only visible on the cara- 
pace and on the abdominal plates. 
Ecutnocexrus (LITHODES) CIBARIUS. 
Carapace considerably wider than long, subtriangular, very irre- 
gular above ; the front sinuated, with a large projecting pointed beak 
springing from the middle, and armed above with three or four spines 
arising from one knob; the sinus on each side has three spines, the 
outer one very large and projecting; edge of the carapace more or 
less spined all round, the spines on the latero-anterior ridges being 
sharp, those on the latero-posterior and posterior edges being blunt ; 
the latero-anterior and latero-posteriocr edges separated by a deep 
notch; general surface of carapace closely covered with tubercles, 
which are perforated, and furnished with bristles springing from the 
holes; on the stomachal region there is a high conical projection, 
the sides of which are comparatively smooth; near the base of this 
on each side is a smooth somewhat oval wart, with an impressed line 
behind it; on each branchial region a high conical projection, and 
another behind the middle of a straight line drawn between the 
branchial tubercles; the posterior edge of the carapace with two 
rather large tubercles separated by a slight sinus. 
Chele with the end of the fingers hollowed out somewhat like a 
spoon, the edges granulated, the hands with numerous large bristly 
pointed tubercles on the outside, three of these being on the upper 
edge; the wrist with a large triangular expansion on the inside, 
which is spined and tubercled above; second, third and fourth pairs 
of legs nearly as long as the first pair, and very similar in appearance, 
but not so thick; the third joint from the tarsus flat on the sides ; 
the upper surface of the legs with large conical bristly tubercles or 
spines; the spines on the tibial joint arranged in three longitudinal 
lines ; the tarsus spined, particularly on the lower edge; fifth pair of 
legs quite concealed within the branchial cavities. 
Outer antenne with a large appendage at the base; this appendage 
is smooth below, and has four longitudinal rows of spines on its up- 
per portion, the lateral rows having the longest spines. 
Inner antenne situated beneath and to the outside of the eyes; the 
first joint very thick, particularly at the base, subcylindrical ; second 
and third joints cylindrical, nearly equal in length, thickest at the tips. 
Eyes close together, placed under the frontal spine; the peduncle 
is much shorter than, and not nearly so thick as, the basal joint of 
inner antenne; the upper side covered with small spines. 
Outer jaw-feet resemble those of Lithodes, especially in L. brevipes. 
Abdomen very wide, rounded at the base, triangular at the end, 
formed of many plates of different sizes, which are close together ; 
