BRACHYURA. 369 



largest on the animal and already mentioned 3 branchial (paired), of which one is 

 lateral while the other two are dorsal, and so placed that a straight line uniting them 

 would on being produced anteriorly pass between the antero-lateral gastric tubercle 

 of the same side and the median gastric tubercle 2 hepatic tubercles (paired), a 

 larger one below and to the outer side of a smaller 1 sub-hepatic (paired) 1 buccal, 

 i.e., the produced antero-external angle of the buccal cavern (paired) 1 pre-buccal 

 tubercle (paired), quite small, just anterior to and a little above the buccal tubercle, 

 its apex points downwards and outwards finally, 1 at either end of posterior margin 

 of the carapace. The buccal, the sub- hepatic, and the lateral branchial tubercles on 

 either side are united by a low ridge forming an approximately straight line. 



The upper margin of the orbit is smooth, there is no dorsal spine in this region. 



The sternal surface is devoid of spinules. 



Each tubercle tends to be crowned by one or two hairs of the straight variety. A 

 dorso-lateral longitudinal row of hooked hairs is conspicuous on the branchial regions 

 of either side ; it commences on the region above the base of walking leg 3 and runs 

 forward below the two dorsal branchial tubercles. On the anterior half of the 

 carapace the hooked hairs are numerous and tend to run in lines which converge 

 anteriorly. 



The abdomen has in both sexes six divisions, somite VI. and telson being as usual 

 fused. On its tergal surface are both straight and hooked hairs. 



The basal antennal joint is smooth and fixed, being fused distally to the front. The 

 antennal flagellum is fringed feather- wise with long straight hairs. 



In the external maxillipeds the inner edge of the ischium and of the merus is 

 fringed with long straight hairs. The inner edge of the ischium is finely toothed and 

 its exposed surface tends to be roughened (under lens) ; the roughening is most 

 marked along two slight longitudinal carinse which border a somewhat V-shaped 

 median longitudinal depression. The merus also is grooved longitudinally. 



In the chelipeds the under border of the ischium and of the merus, and the upper 

 and under borders of the laterally compressed hand, are carinate and finely denticulate ; 

 the denticulation is continued along the proximal half of the under border of the fixed 

 finger. The rest of the cheliped is smooth. The fingers are strongly incurved and 

 are apposable throughout their length. Long straight hairs fringe the upper and 

 under borders of all the cheliped segments. Hooked hairs are arranged in a median 

 longitudinal row on the outer surface of the arm ; they occur also on the lower part 

 of the outer surface of the wrist and on the upper portion of the outer surface of 

 the hand. 



The dactylopodites of walking legs 3 and 4 are slightly falciform, the curve strongest 

 proximally. The walking legs possess some long scattered straight hairs. A row of 

 hooked hairs is present on the upper border of all the segments of all the walking legs 

 except the dactylopodites of the last two pairs. 



Variation among the ovigerous females concerns (1) the size but not the number of 



3 B 



