STALK-EYED CRUSTACEA 377 



Synopsis of the Species. 



A. Rostrum well marked. 



a. Eye-stalks longer than breadth of frontal border. 

 a^. Eye -stalk is longer than antennal peduncles by 



about one-third of its length. — (P. s/>mipes.) 



b. Eye-stalks not so long as breadth of frontal border. 

 b^. Eye-stalks reach to middle.of last joint of antennal 



peduncle. — {^P. tria?igi{latJis.) 



c^. Eye-stalks reach to about the extremity of last 

 joint of antennal peduncle. — {P. sayi.) 



B. Rostrum not well marked. 



c. Eye-stalks not so long as breadth of frontal border. 

 d^. Eye-stalks slightly longer than antennal peduncle. 



— (P. planatus?) 



e^. Eye-stalks exceed antennal peduncle by about one- 

 sixth of their length. — (P. lyuiatii.) 



I. Paguristes spinipes. 



Pagiiristes spinipes . A. Milne Edwards, A. Milne 



Edwards and Bouvier. 

 Paguristes visor . . Henderson. 



Rostrum well marked and slightly depressed ; the 

 posterior portion of the carapace is semicalcareous towards 

 the centre. The eye-stalks are curved laterally, exceeding 

 the antennal peduncle by one-third of their length, with a 

 few hairs on their upper surface ; the basal scales are 

 obscurely bidentate. Antennal acicle extends to the 

 middle of the last joint of the peduncle ; its surface is hairy, 

 and has two spines on the outer border and one or two on 

 the inner; the external prolongation of the second joint 

 is short and its apex bidentate ; the flagellum is nearly as 

 long as the body, slightly ciliated. The first pair of legs 



