MUNIDOPSIS HYSTRIX. 89 
border of the carapace is ornamented with six (in one specimen seven) 
spines. There are also several spines on the sides of the carapace below 
the epimeral suture. There is a very small spine over each eye. The an- 
tenne are shorter than the body, the first joint bears a long external spine, 
the second joint two lateral spines, the third joint two lateral spines and one 
superior. The chelipeds are long and slender, the merus and carpus have no 
long spines, the propodite carries four spines on the upper edge and several 
rudimentary spinules ; the fingers are spinulose, their cutting edges straight 
and denticulated. The ambulatory appendages have spiny meri and carpi, 
the longest spines being one at the distal superior border of each of these 
joints. The second, third, and fourth abdominal terga bear four spines each, 
and the pleurz of the second abdominal somite carry a few spinules. The 
abdominal pleurs are rounded. 
Length, 23 mm.; length of carapace, 12.4 mm.; breadth of carapace, 
8 mm.; length of rostrum, 4.5 mm. 
Station 3389. 210 fathoms. 1 male, 1 fem. 
This species bears a general resemblance to M. erinacea (A. M. Edw.) and 
M. spinifera (A. M. Edw.). It differs from both of these in having a flatter 
carapace marked by a deeper transverse depression across the cardiac area ; 
in having a larger number of spines on the sides of the carapace; in the pres- 
ence of spines on the pterygostomian regions, and a small but distinct spine 
over the eye. It also has strong spines on the superior edge of the hand 
which are wanting in IZ, erinacea and M. spinifera. In the possession of three 
pairs of gastric spines it agrees with M. spinifera, but differs from J. erinacea. 
Munidopsis hystrix Fax. 
Plate XIX., Fig. 1, 1°. 
Bull. Mus. Comp. Zodl., XXIV. 183, 1893. 
Carapace setose and thickly covered with small spinous tubercles ; three 
spines of special prominence on the gastric area disposed in the form of a 
triangle, with apex directed backward; one on the cardiac area; two (rarely 
six) on the hind margin of the carapace ; one on each branchial area. There 
is a spine at the external angle of the orbit, and the lateral margin of the 
carapace is spinose. The rostrum is long, lightly curved upward from the 
base to the tip, and armed with from two to five spines on each side ; these 
spines are unsymmetrically arranged on the two sides The second, third, 
12 
