128 STALK-EYED CRUSTACEA 



far forwards, is in the present species almost obsolete, 

 being represented only by its tubercular posterior ex- 

 tremity. The front is formed of two lobes. The legs arc 

 nodose and granulated like the carapace. The outer 

 surface of the hand is tuberculated, the tubercles being 

 arranged, inferiorly, in three longitudinal rows. 



Range. — Barbados, Santa Cruz, Florida, Bahia ; in 

 shallow water. 



5. Xantho. 



XantJw . . Leach, Desmarest, H. Milne Edwards, 

 De Haan, Dana, A. Milne Edwards, 

 Cancer . . Miers. Linne. 



Carapace transverse and depressed, often nearly flat 

 above, with the dorsal surface lobulated, at least near the 

 front and antero-lateral margins. The front projects 

 slightly and is usually divided by a small median notch ; 

 the antero-lateral margins are arcuated and divided into 

 four or five lobes. The eyes have thick short stalks. 

 The orbits have a fissure beneath. The external antennae 

 are short ; the basal joint reaches the infero-lateral frontal 

 process, and the flagellum lies within the interior orbital 

 hiatus. The external maxillipedes have the fourth joint 

 quadrate ; the inner angle is truncated. The first pair of 

 legs large, with the palms compressed, rounded above, 

 and the fingers toothed on their inner margins. The 

 walking legs are of moderate length, without keels or 

 spines. 



The abdomen is five to seven-jointed. 



Range. — Atlantic and Pacific Ocean ; in shallow 

 water. 



