160 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
and has been very well figured by Milne-Edwards. The anterior 
margin of the buccal cavity is nearly straight, and does not present 
the deep lateral emarginations which occur in M. crenulatus. The 
pterygostomian regions are a little granular, and much resemble 
those of the latter species. 
In the size and the form of the male abdomen this species 
agrees very well with the rare Crustacean described by Ger- 
staecker. All the joints are distinctly separated from one 
another, none of them being coalescent. The first (or terminal) 
joint is nearly quadrate and rounded anteriorly. The second 
is almost as long as the first, but much broader, the breadth 
of its posterior margin being in proportion to the length of 
the joint as 84:2. The third joint is scarcely shorter than 
the second. 
The anterior legs are almost equal to one another, and about 
twice as long as the breadth of the carapace. The arms pro- 
ject the distal half of their length beyond the lateral margins 
of the cephalothorax, and reach therefore to the middle of 
the meropodites of the legs of the third and fourth pairs. They 
are triquetrous, as in the preceding species, the anterior and 
the posterior surfaces being concave. The upper surface is 
a little curved, the minutely granular external or distal half 
making a very obtuse angle with the smooth internal or proximal 
portion. The latter part bears the musical crest, which is close 
to the anterior margin ; and behind the crest is a longitudinal row 
of short hairs. The anterior margin of the upper surface of the 
arms is a little granular, five or six somewhat larger acute — 
granules being found near the distal end. Some small acute 
granules are also seen ‘along the middle of the posterior 
margin. The internal angie of the wrist is marked with some 
small acute granules. 
The hands much resemble those of some species of AZacro- 
phthalmus, the palm being longer than broad, and the fingers: 
deflexed downwards. They are nearly as long as the distance 
between the external orbital angles. The palm is a little more 
than once and a half as long as it is broad (high) at its distal 
end, the proportion of the length of the palm to its breadth 
at the articulation of the mobile finger being as 104 to 64. The 
fingers are half as long as the palm; the immobile finger is 
slightly deflexed, but the mobile is strongly curved downward. 
