tvio Specii'X of Co)-aI-tJifestin(/ Crab. IX') 



the indentations which hxlj^e the eyes extend furtlicr into 

 the carapace than the median indentation. All f'onr lobes, 

 bnt eNpeciaily tiie frontal ones, carry moderately large 

 spinnlcs on thcii- npptjr surfiice. The gap between the frontal 

 and antero-latcral lobe on either side is oeeujjicd by the eye, 

 which carries several spinnlcs on the inner snrfaee of the 

 stalk, near the corneal margin. Immediately in front of the 

 frontal lobes are seen the prominent and spinulose basal 

 joints of the antennules, with their folded terminal joints 

 nearer the middle line. In the comparatively narrow interval, 

 seen from above, between the basal antennnlar joint and the 

 eye on each side is found the small antenna with its rudi- 

 mentary Ihigellnm. The lateral margins of the carapace, 

 "which form a continuous line on either side, are subparallel 

 for the first third or so of their length, but have an outward 

 eonvt xity in the branchial regions ; the posterior margin is 

 about the same ^idth as the frontal margin, and has a slight 

 forwai'd curve. The lateral margins of the carapace are 

 everjMvhere spinulose, but sj)inules are scarcely represented 

 on the posterior margin. The pterygostomial regions are 

 without spinules and terminate below each eye-stalk in a 

 pointed angle. 



Viewed from below the large basal antennnlar joints lie 

 parallel to one another, separated by an interval in which 

 the two terminal joints of each anteunule are perpendicularly 

 folded ; s|)inules are present on the basal joints and reach a 

 comparatively large size towards their apices. The antenna 

 occupies a narrow interval between the basal autenuular 

 joint and the eye on each side ; the peduncle is composed 

 of three free joints, of which the first, articulated to the 

 edge of the epistome, is longer and stouter than the other 

 two, and carries two or three small spinules at its lower 

 distal end ; the fiagellum is represented only by the 

 merest rudiment and terminates in a few minute setse. 

 The eyes are placed immediately external to and practically 

 parallel to the antennae ; the inner surfaces of the stalks are 

 spinulose, and the spinules extend as far as the corneal 

 margin. The edge of the pterygostomial region, contiguous 

 to the insertion of the eye-stalk, shows a distinct indentation, 

 but otherwise the orbit is deficient below. The epistome is 

 somewhat hollowed out, owing to the projection of the 

 pterygostomial angle on each side; the renal tubercle is 

 distinctly visible below the first free joint (second true joint) 

 of the anteuual peduuele. 



^Vhen the eyes, antennae, and antennules are completely 

 removed, a comparatively deep and continuous cavity 



