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MUNIDOPSIS ORNATA. 87 
external spine. The chelipeds are robust, setose, and granulate; the merus 
has a short superior spine and two lateral spines at the distal end; the carpus 
is similarly equipped, though on one side the superior spine is obsolescent ; 
the chela is broad and strong, the fingers excavated, denticulated on their 
cutting edges and at their tips. The merus of the first pair of ambulatory 
appendages has an external distal spine; the carpus of all the ambulatory 
limbs has two low longitudinal ridges, and the carpus of the first and sec- 
ond pair has a spine on the upper border at the distal end of the joint. 
Length, 55 mm.; breadth, 18 mm.; length of carapace, 31 mm.; ros- 
trum, 8 mm. 
Station 3394. 511 fathoms. 1 male. 
Munidopsis villosa is very closely allied to the West Indian Munidopsis 
abbreviata (A. M. Edw.),* from which it differs as follows: the tubercles and 
ridges of the carapace are more pronounced and the whole surface of the 
animal more hairy. The frontal border is armed on each side with a sharp 
spine, which is wanting in JZ. abbreviata. The median dorsal spine on the 
fourth abdominal somite is obsolete, while the fifth somite bears a well- 
developed acute spine, like those on the second and third somites. In 
M. abbreviata the fifth somite is unarmed. The distal half of the rostrum 
is curved upward much more strongly in MW. villosa than it is in MW, abbreviata. 
Munidopsis villosa is represented by a single specimen in the “ Albatross ” 
collection. It is very much larger than the type specimen of JZ. abbreviata 
from the “ Blake” dredgings, and it is possible that the peculiarities above 
specified may be due to age or individual variation. But I think it more 
probable that we have to do with two closely allied or representative species 
on the Atlantic and Pacific sides of the continent. 
Munidopsis ornata Fax. 
Plate XX., Fig. 1, 1°. 
Bull. Mus. Comp. Zodl., XXIV. 186, 1893. 
Carapace convex, the whole upper surface, including the rostrum, thickly 
covered with low squamous tubercles; under a magnifying power the sur- 
face of each tubercle is seen to be made up of a number of secondary 
scale-like prominences; the tubercles are not lengthened out transversely to 
form ridges in any part of the surface; two of the tubercles on the gastric 
* Galathodes abbreviatus A. M. Edw., Bull. Mus. Comp. Zodl., VIII. 55, 1880; Maunidopsis abbreviata 
A.M. Edw. et Bouv., Ann. Sci. Nat., Zool., 7°™* Sér., XVI. 275, 1894. 
