160 DE. J. a. DE MAN ON THE PODOPHTHALMOTJS 



and lias 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 Grer- 

 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 3| : 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 angle of the wrist is marked with some 

 small acute granules. 



The hands much resemble those of some species of Macro- 

 pJdhalmus, 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 10| to 6J. The 

 fingers are half as long as the palm j the immobile finger is 

 slightly deflexed, but the mobile is strongly curved downward. 



