488 STALK-EYED CRUSTACEA 



above and five or six below. Legs of the second 

 pair very long, thin, cylindrical, and armed with many 

 longitudinal rows of small points ; pincers large, cylin- 

 drical, as long as the palmar portion of the hand, and 

 surrounded with a close down. Following legs short 

 and almost smooth. The last segment of the abdomen 

 terminates in three spines, of which the central one is 

 very strong. 



Range.— Rio Para, Gulf of Mexico, West Indies. 



8. Bithynis ensiculus. 

 Pal<2iiion ensiculus .... Smith. 



The rostrum is very long, strongly curved downwards 

 for the basal half of its length ; the terminal half very 

 slender, nearly straight, but strongly inclined upwards ; 

 it has nine to twelve teeth above, of which seven or eight 

 are on the basal portion, and eight to twelve teeth below. 

 The flagella of the internal antennae are very long ; the 

 basal scale of the external antennae is not as long as the 

 rostrum, and has a rounded extremity ; the peduncle has 

 a spine on the outside and the basal scale another on 

 the extremity of the outer margin ; the flagellum is very 

 long. 



The first pair of legs, slender, reach beyond the 

 extremity of the basal antennal scale, smooth and naked 

 except for a few tufts of hair on the hands. The second 

 pair of legs is very long and slender ; the fifth joint is 

 longer than the palm of the hand ; all the limbs have 

 spinules. The three posterior pairs increase in length 

 backwards. The telson tapers to a point 



Range.— Para. 



