492 STALK-EYED CRUSTACEA 



in a flattened joint, and is furnished with a long external 

 appendage. The first two pairs of legs are slender, the 

 second being much longer than the first, and having the 

 fifth joint about four times the length of the sixth. The 

 three following pairs of legs are very long, articulation 

 between the third and fourth joint overlap, the fifth joint 

 is many times longer than the sixth, and the seventh is 

 short and sharp. The telson is subequal with the inner 

 branch of the swimming organ. The ventral surface of 

 the three posterior segments under the carapace carry a 

 flat anteriorly projecting plate, in the male, on each 

 side of the middle line ; in the female it is only on the 

 fourth segment. 



The gills are attached to the five last segments of the 

 body wall, to the membrane between the body and the 

 first joint of all the limbs except the first maxilHpede and 

 the last pair of legs, and to the first joint of the first 

 maxillipede. The two maxillipedes have branchial plates. 



Range, — Atlantic and Pacific Oceans ; in deep water. 



I. Nematocarcinus cursor. 

 Ncniatocarcinus cursor , . , A. Milne Edwards. 

 Range, — West Indies. 



Family V. Tropiocaridse. 

 Ti-opiocaridcE , . , . Spence Bate. 



Carapace not laterally but dorsally compressed. 

 Frontal regions projecting above the eyes, and produced 

 to a short pointed rostrum. Internal antennae have two 

 flagella. The external antenna; have a basal scale which 

 is long and narrow. First two pairs of legs subequal, 

 small, with pincers. Telson long and tapering. 



