STALK-EYED CRUSTACEA 489 



9. Bithynis jelskii. 

 PalcEDion jelskil .... Miers. 



Body smooth. Rostrum long and slender, reaching 

 beyond the end of the basal antennal scale, at base rising 

 considerably above the dorsal surface of the carapace ; 

 apex slightly directed upwards, upper margin armed with 

 six or seven teeth towards the base, and three at apex, 

 below with seven teeth. 



The longest flagellum from the internal antennje about 

 as long as the body, that from the external antennae very 

 long. Second pair of legs filiform, no thicker than the 

 rest, and not much longer than the carapace and rostrum ; 

 fifth joint about twice as long as the hand, which has the 

 palm and fingers equal. 



Range. — Guiana. 



II. A ivide space bctivccn fingers of large hand zvJien 

 closed : — 



10. Bithynis spinimanus. 



Bithynis spitiinianns . . . Kingsley. 

 Palenion spinimanus . . . H. Milne Edwards. 

 Palcemon faustimis . . . Saussure. 



Rostrum almost straight, not as long as the peduncle 

 of the internal antennas, and armed with thirteen or 

 fourteen small teeth above and three or four belovv^ Legs 

 of the seeond pair stout, of unequal size, and very spiny ; 

 a row of large curved spines close together upon the 

 superior border of the hand, and numerous long fliexible 

 hairs upon its internal face ; pincers short, large, and 

 bowed, leaving a space between them ornamented with 



