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bifurcates distally; the mesogastric area has two shallow depressions. A cervical groove does 

 not exist, at least in the adult specimen. The front is extremely short, almost linear, obliquely- 

 deflexed; in dorsal view it consists of two little-prominent lobes, separated by a shallow notch, 

 but in front view (fig. 3^) the anterior margin is perfectly straight and measures one-fourth 

 of the breadth of the carapace. The small orbits are not visible in dorsal view; 

 the eye-stalks are very short, cylindrical, firmly fixed and provided with a well-deve- 

 loped, normal eye. The obtuse lateral margins of the carapace, rendered rugose, like 

 the surface of the front, by numerous flattened granules, are much convex in the anterior two- 

 thirds of their course, but distally they are subparallel to each other and disappear altogether'); 

 in their vicinity the epibranchial and subbranchial regions, both granulate, imperceptibly pass 

 into one another. The posterior margin of the carapace is very long, convex, but concave in 

 the middle part, and accompanied along its whole course by a fine ridge. The lateral margins 

 are provided with a fringe of fine hairs, continued across the front. 



The two free joints of the antennular peduncle are much elongate and slender, and 

 scarcely to be folded within their fossae. The stem of the antennae is short, coalesced with the 

 underlying parts, but the last joint of the peduncle is free, and bears a long flagellum, three 

 times as long as the transverse diameter of the orbit. The epistome is very short, almost Hnear; 

 its hind edge is not projecting, somewhat thickened, in front view consisting of two 

 deeply-concave parts, separated by a lobe. The lateral walls of the buccal cavity are feebly 

 convergent backward, concave in their anterior part and connected with the epistome by a 

 prominent lobe. External maxiUipeds (fig. T,d) large, granulate towards inner margin of ischium 

 and merus; the former is broad, longitudinally grooved, with sharpened antero-median angle 

 and somewhat longer than the merus, which latter is broadly auriculate at its antero- 

 external angle; the palp is long and, if inflexed, easily reaches the ischium. The exognath is 

 for the most part visible in normal position and only half as broad as the ischium. 



The chelipeds, at least in the adult cf, are largely unequal (compare figs 3 1 and 3^!^), 

 the right being by far the larger, but in the young cf the chelae, though of a similar shape 

 as those of the adult, are nearly equal in size. The meropodite is short, but strongly increasing 

 in size distally, outer border not sharpened and provided with sharpened granules, upper border 

 terminating in a subdistal, sharp tooth, inner border granulate, and, in the case of the large 

 cheliped, provided with a small tooth, about in the middle of the margin. The wrist is of a 

 rhombic shape, short, with a few punctae in the proximal part of the upper surface, and the 

 inner angle transformed into a sharp point. The large chela (fig. 3^) is very high, 

 smooth and glossy, with a few scattered, large pits on the outer surface, upper and especially 

 lower border sharply keeled, proximal lower portion projecting backward in a sort of 

 elbow-like prominence, inferior border of chela very deeply sinuous, palm little 

 longer than high, with a very large and deep depression on the inner surface, near the base 

 of the immovable finger; fingers shorter than palm, compressed; lower finger much deflexed, 

 curved upward at tip, proximal half of cutting margin provided with four teeth, the second of 



l) I have failed to detect a minute spine, denoted by Alcock, at the transition of antero- and posteio-lateral margins. 



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