's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 169 



two median, that are elongated transversely, and two lateral, rounded 

 ones. The grooves, defining the usual regions on the carapace are strongly 

 marked, especially the cervical groove, separating the mesogastric and 

 cardiac region, at either end of which groove a rhombic region may be 

 distinguished; the gastric region is well defined, though protogastric and 

 mesogastric part are not clearly separated off; the hepatic area is also 

 distinct from the branchial one, but cardiac and intestinal region pass 

 into each other. 



The external maxillipeds, as also the pterygostomian regions, are some- 

 what hairy; the ischium, that is longer than the merus, is as broad as 

 the exognath (in the Q); the latter reaches nearly to the strongly auri- 

 culated, anterior border of the merus, that is much broader than long. 



All the legs are, as observed by de Man, short, and the chelipeds of 

 the 9 are equal in size ; the meropodite of these is very short, granulated 

 at outer surface, with a strongly-curved superior border, that shows some 

 long hairs in the first half; the carpopodite is likewise granulated extern- 

 ally, and the inner angle is produced and subacute, though not spiniform ; 

 the palm is as high at the base of the fingers as long, slightly longer 

 than the fingers, there is a horizontal row of 3 — 4 granules, besides some 

 other ones, at the inner surface (de Man does not mention these granules), 

 the outer surface is convex, with some sparse hairs and large granules, 

 of the latter there are two conspicuous, horizontal rows, diverging some- 

 what distally, the ventral row continued on to the tip of the immobile 

 finger, the interspace between the rows is smooth, and above the upper 

 row, which it itself composed of somewhat larger granules than those of 

 the other, are similar large granules, irregularly placed ; the fingers are 

 excavated at the tip, that is lined by a dark brown, thickened margin, 

 the cutting margins are provided with some hairs, and with a few small, 

 obtuse teeth, two quite near the base of the movable finger, and 3 — 4 

 on the immobile finger, which latter are clearly visible by their chalk- 

 white hue. 



The walking legs are scarcely longer than the chelipeds, the first three 

 pairs of nearly equal length, the last pair considerably shorter. The upper 

 surface of the meropodites is granular, the anterior border is unarmed, 

 but the upper margin of the posterior border is armed near the distal 

 end with some teeth : there is one large tooth and 2 — 3 smaller teeth ; 

 only in the last pair of legs also the under margin of this border has 

 a few small teeth, diminishing in size distally, and beginning near the 

 basal end of the joint. Carpo- and propodites of the ambulatory legs 

 are very short, in the case of the middle pairs the propodite is very 

 slightly longer than the dactylus, in the first and four pair it is shorter ; 



