CRUSTACEA MALACOSTRACA. II. 



62. Leptognathia vicina u. sp. 

 (PI. IX, figs. 6a— 6 i.) 



Female. Moderately robust (fig. 6a), from six to seven times as long as broad and seen from 

 above subcylindrical, yet with the carapace and the middle of abdomen from slightly to distinctly 

 broader than the thoracic segments. — Carapace nearly as long as, or slightly longer than, the two 

 following segments combined (fig. 6 a), seen from above less or more distinctly hexagonal and sub- 

 similar to that of Z. polifa^ but the broadest place is only a little before the middle; frontal process 

 small, acute. 



Antennulse (fig. 6b) much shorter than the carapace and moderately slender. First joint some- 

 what shorter than the three other joints combined, a little more than twice as long as deep; second 

 joint distally moderately produced above, with its upper margin half as long as the first joint but not 

 quite twice as long as the depth; third joint above slightly more than half as long as the second; 

 fourth joint a little shorter than the second and not much shorter than its terminal setse. — Antennae 

 as long as the three proximal antennular joints combined, with fourth and fifth joints well separated 

 and fifth joint half as long again as the fourth, which is slightly longer than the sixth. 



Chelipeds (fig.s. 6b and 6f) somewhat similar to those in L. polita^ but yet showing some differ- 

 ences. Basal joint about as long as deep, with the posterior protuberance, seen attached to the animal 

 and from the side, not only somewhat short but low — when the cheliped has been removed and 

 pressed a little under a glass-cover that protuberance shows itself to be a good deal broader (fig. 6f) 

 because its lower part, which on the animal turns downward, then becomes visible. The area between 

 the basal joint and the thin integument behind the cephalothorax is large, a little more than twice as 

 long as deep, but the hind margin of the posterior protuberance is yet situated a little behind the 

 middle of the cephalothorax. Carpus much longer than the basal joint, conspicuously less than half 

 as long again as deep, and its lower margin has a conspicuous protuberance bearing two setse. Chela 

 as long as the upper margin of carpus plus the basal joint and a little more than twice as long as 

 broad; anterior margin of the hand a little longer than the movable finger, which is very thick 

 towards the base, but its incisive margin has its proximal half a little concav^e and without any pro- 

 tuberance before the middle; the fixed finger has on the incisive margin a feeble proximal and a 

 more oblong and conspicuous though rather low distal protuberance. 



Thoracic segments (fig. 6a) transverse with their lateral margins a little convex or rather sub- 

 angular and as usually in such cases second to fourth segments are broadest before the middle, the 

 other segments broadest gradually more and more behind the middle. Second thoracic segment some- 

 what or considerably shorter than the third. — Thoracic legs of moderate length; second (fig. 6b) and 

 third pairs in the main as in L. polita^ but seventh joint with claw as long as or a little longer than 

 sixth joint. Three posterior pairs (fig. 6g) in the main as in L. polita. but sixth joint almost longer 

 than the seventh joint with its somewhat short claw. 



Abdomen somewhat shorter than the three preceding segments combined (fig. 6 a). Ventral side 

 of the five anterior segments (fig. 6h) with rounded moderate protuberances; the moderately small 

 pleopods and their setse also nearly as in L. polita. Sixth segment .somewhat shorter than the sum 



