334 Carrivohgicnl Fauna of Inih'a. 



Subfamily Asthenognathin^, Stimps. 

 Chasmocarcinops, n. gen. 



Carapace deep, convex fore and aft and declivous anteriorly : its 

 greatest breadtli is quite posterior, so that the postero-late:al borders, 

 •which are blunt, are anteriorly-convergent, though sliglitly so : the 

 anteio-lateral borders are sharp and form an elegant curve Avith the 

 anterior border : the regions are nearly as well defined as they are in 

 Scalopidia: its length is hardly less than its breadth. 



The fionto-orbital border is considerably more than a third, but 

 the front (which is bilobed) is only about a sixth, the greatest breadth 

 of the carapace. 



The orbits, which are in the usual marginal position, are small, and 

 the eyestalJcs, which are immovable, are shrunk wifltin them : the eyes 

 are minute. 



The anteunulary flagella are large and cannot be retracted into 

 the anteunular pits, which are filled entirely by the basal joint. 



The antenual flagella are long — considerably moi'e than a third the 

 length of the carapace — and stand in tlie orbital hiatus. 



Epistome sunken and not altogether well demarcated from the 

 paliite. The buccal cavern has its antero-exterual angles rounded ofF, 

 and is not nearhj closed by the external 7naxillipeds : these have the merns 

 much shorter and narrmver than the ischium, oval and somewhat oblique, 

 and the fligellum appears to articulate with the summit of the merus. 



The chelipeds are about as long as the legs and are very unequal 

 in the male. 



The third pair of legs are slightly the longest. As in Scalopidia 

 the dactylus of the last pair of legs is recurved. 



The abdomen in both sexes is narroW; not nearly occupying all the 

 space between the last pair of legs, and in the male consists of 5 

 pieces, the 3rd-5th segments being fused. In the male also, as in 

 Camatopsis, there is, on either side, a narrow plate intercalated between 

 the 4th and 5th segments of the sternum and covering the extei'nal 

 genital ducts. 



This genus more clearly than any other connects the llhizopinse and 

 the Pinnotheridse together. 



35. Chasmocarcinops gelasimoides, n. sp. 



Carapace nearly as long as broad, its surface abundantly sprinkled 

 with vesiculous granules, its free mai'gins rather sparsely ciliated : all 

 the regions are distinguishable, and the cardiac and posterior lobe of 

 the gastric regions are defined by deep impressions ; the an tero- lateral 



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