396 CRUSTACEA. 



The male has a crenated raised line along the outer side of the 

 moveable finger, while in the female, the ridge is nearly or quite 

 obsolete. The lunaris has the same ridge, but it is either smooth, or 

 only crenated towards the extremity of the finger. 



FAMILY III. LEUCOSID^. 



IPHIS LONGIPES. 



Carapax parce granulosus, suborbicularis, non latior quam longus, 

 armatus spinis duabus longissimis lateralibus latitudine carapacis vix 

 breviaribus (und in latere utroque), et duabus mimitis antero-latera- 

 libus, duabus parvulis postero-lateraUbus, et und posticd corporis dimi- 

 dium longitudine fere cequante. Frons bilobatus parce prominens. 

 Pedes 8 postici prcelongi. 



Carapax sparingly granulous, suborbicular, not broader than long, 

 having two lateral spines (one either side) as long as breadth of 

 body, two minute antero-lateral, two postero-lateral quite small, and 

 one posterior nearly half as long as body. Front bilobate, sparingly 

 prominent. Posterior feet very long and slender. 



Plate 25, fig. 4 a, male, natural size; b, outer maxillipeds; c, abdo- 

 men. 



Taken from the stomach of a Tetraodon, among the reefs of Viti 

 Lebu, Feejee Islands. 



Length, excluding the posterior spine, ten and a half lines ; with 

 this spine, fourteen and one-fourth lines; breadth, excluding the 

 lateral spines, ten and three-fourths lines, and with these spines, 

 twenty-four lines. The front of the carapax is less advanced than in 

 Herbst's figure of the septem-spinosa. Besides, this species has either 

 side but one postero-lateral spine, while there are two in the septem- 

 spinosa, and both are much more prominent. The legs also are much 

 longer. The hands and carpus together are as long as the breadth of 

 the body and one lateral spine ; the third joint of the second and third 



