958 



CRUSTACEA. 



lum nearly twenty-jointed, almost naked, appendage short, five to 

 six-jointed ; second pair quite stout, not half as long as body, base 

 long, nearly naked, last two joints subequal, flagellum a little 

 longer than preceding joint, about ten-jointed, joints not oblong. 

 Four anterior feet rather small, hands subequal, broad for the 

 length, partly short hirsute below, apex obliquely truncate, palm a 

 little excavate, lower angle rounded, finger not longer than palm. 

 Sixth and seventh pairs of legs subequal, setae few, short. Poste- 

 rior caudal stylets quite long, projecting much beyond the second, 

 outer branch very stout and bearing some very short spinules, the 

 inner more slender and pilose. 



Plate 66, fig. 1 a, animal, enlarged ; b, part of flagellum of superior 

 antennae with the appendage ; c, same flagellum, towards apex ; d, 

 part of flagellum of second pair, inner side ; e, leg of second pair ; /, 

 part of hand in oblique position ; g, part of palpus of mandible. 



Puget's Sound, Western America. 



Length of body, nine lines. The figure probably represents a 

 female. In the natural position of the hands (shown in fig. 1 a), the 

 back of the hand is towards the observer, and the actual outline shown 

 in (fig. 1 e) is not easily obtained without separating the leg from the 

 body. The mandibular palpus has the inner side of the last joint pec- 

 tinate with short setae. The inner side of the flagellum of the infe- 

 rior antennas is covered with short hairs, about as long as the joints. 

 The second pair of stylets projects hardly as far as the first, and about 

 to middle of branches of last pair. The legs of the fifth pair have the 

 tarsus reversed in the specimen, as shown in the figure. 



APPENDIX TO GENUS GAMMARUS. 

 Gammarus? peruvianus. 



Corpus compressum ; epirneris latis, 5tis rnulto brevioribus quam 4tee. 

 Antennce Irnce corpore parce breviores, 2dis fere duplo longiares, basi 

 breviore quam flagellum, articulis tribus subwquw, secundo paulo Ion- 



