GAMMARIDEA. 9Q1 



margin of fourth or fifth joints of six posterior legs. The outer 

 branch of the first pair of caudal stylets has two spinules on the 

 upper margin besides the apical, and the inner has three. 



Allorchestes pugettensis. 



Epimerce sat magnas. Antemice lmce 2dis dimidio breviores, basi 

 2darum parce longiores, multo graciliores, flagello 15-articulato, setis 

 fere obsoletis ; 2dce dimidio corporis breviores, flagello par ce longiore 

 quam basis, 12-articidato, articulis paulo oblongis, setis minutissimis. 

 Manus lma ovata, infra supraque arcuata, palmd valde obliqud, non 

 depressd. Manus 2da pervalida, subovata, infra truneata, palmd 

 rectiusculd, spinulosd, parce depressd, digito longo, marginis manus 

 angxdum attingente, carpo inter manum articulumque Stium infra non 

 producto, articulo Stio antice triangxdato et subacuto. Pedes bti 6ti 

 Imi sensim increscentes, setis brevissimis, perpaucis. 



Epimerals moderately large. Superior antennse half shorter than 

 inferior, slightly longer than base of inferior pair and much more 

 slender, flagellum fifteen-jointed, setae nearly obsolete. Inferior 

 not as long as half the body, flagellum slightly longer than base, 

 joints a little oblong, setae very minute. Hand of first pair ovate, 

 arcuate above and below, palm very oblique and not excavate. 

 Hand of second pair very stout, subovate, truncate below, so that 

 the palm is straight or nearly so and slightly excavate, finger long 

 and reaching to the angle terminating the palm, carpus not pro- 

 duced below between hand and third joint, third joint triangular 

 and subacute anteriorly. Legs of sixth and seventh pairs subequal, 

 setae few and very short. 



Plate 61, fig. 6 a, animal, enlarged; b, part of flagellum of inferior 

 antennae ; c, mandible ; d, extremity of maxilliped. 



Puget's Sound, Northwest America. 



Length of body, nine or ten lines. The setae of the inferior an- 

 tennae are about one-fourth the breadth of the joints in length. The 

 basal joints of the six posterior legs are nearly as broad as long. The 



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