Oarcinological Fauna of India. 287 



external maxillipeds the anterior prolongation of the buccal cavern is 

 closed in below by a lamellar process of the first maxillipecls. 



The chelipeds in both sexes are short, massive, and equal and 

 symmetrical : the hands are of the chopper-shaped, almost subcheli- 

 form, Raninoid type, the stout fingers being almost at right angles 

 to the long axis of the hand. 



The first and second pairs of true legs are stout and are of great 

 length, their merus being of relatively enormous length : the third 

 and fourth pairs on the other hand, which are dorsal in position as in 

 Dorippe, are extremely short and of filiform tenuity. 



The abdomeu in both sexes consists of six segments : in the male 

 two or three of them are fused and the whole abdomen is very small, 

 in the female the last segment is of great size. 



[? The afferent branchial opening appears to lie in the deep crevice 

 between the base of the antennae and the edge of the buccal frame 

 in which the basal joint of the antennules is lodged.] 



107. Cymonomops glaucomma, Alcock. 



Cijmonomops glaucomma, Alcock, Ann. Mag. Nat. Hist., May 189-4, p. 406, and 111. 

 Zool. ' Investigator,' Crustacea pi. xiv. fig. 9. 



Carapace suhcircular ; it and the appendages are very closely and 

 finely granular beneath a dense pubescence. The front consists of three 

 deeply cut lobes, the middle one of which is the true front and is the 

 largest and most prominent. The middle lobe again is slightly cleft at 

 the tip, and in the cleft is to be seen projecting the roof of the remark- 

 ably prolonged buccal cavity. 



The external orbital angle, which is somewhat ventrad in position, 

 also forms a projecting tooth, so that the orbito-frontal region, which is 

 sharply delimited from the rest of the inflated carapace, has the form of 

 a five-pronged crest or crown. The regions of the carapace are plainly 

 delimited, excepting only in the case of the boundary between the 

 gastric and cardiac regions. The pterygostomian regions are most 

 remarkably puffed out. 



The abdomen (in the female) is large, and the terminal segment 

 has the form of a broad semicircular plate, broader than any of the 

 other segments and nearly as long as all of them put together : in the 

 male the abdomen is very small. 



The orbits are capacious, but the eyestalks are slender and the 

 eyes are unpigmented and semi-opaque. 



The antennules, which are much larger and longer than the an- 

 tenna"", are incapable of flexion beneath the front. 



The external maxillipeds are of great length, in correspondence with 



292 



