576 CRUSTACEA. 



second joint broad, the following slender, last much shorter than 

 preceding. Beak long, compressed and laminate. Inner antennae 

 ending in two flagella. Hands of second pair long and rather 

 slender, equal. Tarsi uncinate, short, but without a protuberance 

 below. 



The outer maxillipeds have the form nearly of those of Pontonia, 

 yet the last two joints are much longer in proportion. In the form of 

 the body and eyes, the species are like the (Edipi, and quite unlike 

 the small-eyed Pontoniae. The tarsi are those of Pontonia. The 

 mandible has the lateral process low bidentate at apex, as in (Edipus. 

 The beak is usually more or less ensiform, though sometimes rather 

 broad at base, as in some (Edipi. The branchiae are five in number 

 on either side, and the leaflets are rather short. 



The name of the genus is from «^ v , pruning hook, and alludes to 

 the hooked form of the tarsus. The species have a thin shell, and 

 like the (Edipi swim free. 



Harpilius lutescens. 



Corpus pernio depression. Rostrum angustum, parce recurvatum, squama 

 antennali paulo brevius, basi intemarum multo longius, supra 7-8- 

 dentatum, infra prope medium 1-dentatum. Pedes antici quoad manum 

 sparsim pubescentes; 2di angusti, manu graeili, fere lineari, digitis 

 linearibus, vix dimidii mantes longitudine. 



Body somewhat depressed. Rostrum narrow, sparingly recurved, a 

 little shorter than scale of outer antennae, and much longer than 

 base of inner, above having seven or eight serratures, and one near 

 middle below. Two anterior feet with the hand sparsely short 

 pubescent. Second feet narrow; hand slender, nearly linear, 

 fingers linear, nearly half as long as hand. 



Plate 37, fig. 4 a, animal, enlarged four diameters (caudal segment 

 mutilated); b, profile of beak; c, upper view of head and antennae 

 more enlarged; d, a", different views of mandible; e, maxilliped of 

 first pair; /, ibid, of second pair; g, ibid, of outer pair; h, extremity 

 of one of eight posterior pairs. 



