448 STALK-EYED CRUSTACEA 



with a long external appendage ; the first joint has a 

 branchial plate, carrying a well-formed gill plume. The 

 external maxillipedes are long, slender, and seven-jointed ; 

 their first joint carries a rudimentary gill plate without a 

 gill plume. The first two pairs of legs have the fifth joint 

 longer than the sixth ; in the third pair it is not quite so 

 long. The last two pairs are slender, having the fifth 

 joint very much longer than the sixth ; both joints are 

 multiarticulate, and terminate in a double pointed finger. 

 The basal joint of all these limbs carries £l rudimentary 

 gill plate without any gill plumes. 



The first pair of abdominal appendages in the female, 

 two-jointed, has only one branch ; the second pair has 

 two branches, but has no internal process. The outer 

 plate of the swimming organ has no division. The 

 terminal joint is long and tapering. 



Range. — Atlantic and Pacific Oceans ; in warm and 

 cold seas. 



I. Stenopus hispidus. 



Stenopiis Jiispidus . Olivier, Latreille, Desmarest, H. 



Milne Edwards, Dana, Spence 

 Bate. 



The entire animal is covered with small, sharp, strong 

 spires, vertLal on the carapace and dorsal surface of the 

 first three segments of the abdomen ; almost horizontal 

 and directed posteriorly on the three posterior segments, 

 and on the telson. The peduncle of the external antennae 

 is furnished with spines, so is the third pair of legs, and 

 the basal joint of the abdominal appendages ; all the 

 other appendages are smooth. 



The third pair of legs is very long, and freely covered 

 with teeth that run in several longitudinal rows, those of 



