CRtrSTACEA. OP THE MEEGUI AECHIPELAGO. 143 



length ; the inner edge of the mobile finger is, moreover, a little 

 prominent along its proximal half, presenting a low longitu- 

 dinal tooth, which is a little more coarsely crenulate at its base. 

 The inner edge of the immobile finger does not present such a 

 tooth or prominence, but a small incision quite at the base. The 

 tips are acute, pointed, and slightly curved, crossing one another 

 when closed. 



The ambulatory legs are rather slender, and resemble those 

 of the species of the genus Selcecius. Those of the third pair, 

 the antepenultimate legs, are the longest ; those of the last 

 pair the shortest of all. The meropodites are strongly com- 

 pressed and flattened on their upper and under surfaces, and do 

 not present the remarkable " tympana " of Dotilla and Scopi- 

 mera ; in the latter the tympana constitute oval impressions 

 which are bordered by a wall of the more elevated portion of the 

 surface of the joint. A histological examination of the legs might 

 nevertheless prove their existence also in our Dioxippe; for 

 when studying the upper surface of these joints by means of a 

 magnifying- glass I observed oval Hues bordering the central 

 flattened part. The meropodites have minutely granulated 

 upper and under margins, but are for the rest unarmed. 

 The other joints are smooth and unarmed ; the propodites are 

 also compressed. The dactylopodites are a little shorter than 

 the propodites, are laterally compressed, and acute. The ambu- 

 latory legs are also nearly glabrous ; the dactylopodites are, 

 however, a little hairy along their margins, and the legs of the 

 second and third pair present a dense hairy down at the articu- 

 lation of their carpopodites with the propodites, along the upper 

 margins and on the upper and the under surfaces of these 

 joints. 



Dimensions of the largest male specimen : — 



millim. 



Length of the cephalothorax (without the epistome) . . 4f 



Distance between the upper external orbital angles . . 6-^ 



G-reatest width of the upper surface of the carapace . . 6|- 



Length of the anterior legs 21 



Length of the hands Sf 



Height of the palm 83- 



The greatest width of the upper surface of the cephalothorax 

 of the ova-bearing female is scarcely 5 millim. 



