CRUSTACEA. 



GENUS PALvEMONELLA (Dana). 



PalEemoni qffinis, rostro tenui, laminato, elongate, pedibus 4 anticis che- 

 latis, 2dis majoribus, antennis internis cum tribus flagellis instructis, 

 mandibulo palpigero. Palpus mandibularis perbrevls, 2-articulatus. 

 Flagella duo antennarum internarum fere ad apices in uno conjuncta. 



Related to Palsemon, the beak being long, thin and slender, the four 

 anterior feet chelate, and second pair the larger, the inner antennae 

 with three flagella, mandibles palpigerous. Palpus of mandibles 

 very short, two-jointed. Two of the flagella of the inner antennae 

 united nearly to their tips. 



In both of the species of the genus here described, the carapax has 

 two spines below the eye in nearly the same horizontal line. The 

 outer maxillipeds are slender, as in Paliemon. The anterior legs are 

 very slender; the second pair moderately stout, with the hand nearly 

 cylindrical, and hardly stouter than preceding part of the leg. 



PAIJEMONELLA TENUIPES. 



Rostrum rectum, non refiexum, squamd antennali non longius, supra 

 b-7-dentatum, dentibus 'inter se fere ceque remotis, infra 2-dentatum 

 et non dilatatum, apice acutum. Pedes 2di valde elongati, apice 

 bracldi apicem rostri vix superante et infra supraque acuto, carpo 

 dimidii manus longitudine, apice spind armato, digitis dimidio manus 

 brevioribus. Pedes 6 postici gracillimi fere nudi. 



Beak straight, not reflexed, not longer than basal scale of outer an- 

 tenna}, above six or seven-toothed, teeth nearly equally spaced ; 

 below not dilated, two-toothed, acute at apex. Second pair of feet 

 very long, apex of arm reaching to apex of beak, and acute above 

 and below, carpus half as long as hand, having a spine at apex, 

 angers not as long as half the hand. Six posterior feet very slender, 

 naked or nearly so. 



