930 CRUSTACEA. 



caudate fere usque ad basin fissum, et ad apices ambos emarginatum. 

 Antennce subwquw; lines parce longiores, dimidii corporis longitudine, 

 basi valde breviore quam flagellum, et parce breviore quam basis 

 2darum, setis infra longiusculis ; 2darum basis flagello midto brevior. 

 Pedes antici parvuli, rnanu apice obliqud et non latiore. Manus 

 secunda rnediocris, oblonga, infra ciliata, apice parce obliquo, digito 

 brevi. Pedes 6 postici subosqui, non longi, setis brevibus. Styli cau- 

 dales postici longi. 



Body compressed ; epimerals large. Eyes reniform. Caudal segment 

 divided nearly to base, and each part emarginate at apex. An- 

 tennae subequal ; the superior sparingly the longer, half as long as 

 body, base much shorter than flagellum and a little shorter than 

 base of inferior pair, setae of under side of antennae rather long; 

 base of inferior pair much shorter than the flagellum. Anterior 

 feet small, hand oblique at apex and not broader. Hand of second 

 pair moderately small, ciliate below, apex sparingly oblique, finger 

 quite short. Six posterior feet subequal, rather short, setae quite 

 short. Posterior caudal stylets long. 



Plate 63, fig. 4 a, animal, enlarged; b, b\ views of mandible; c, d, 

 maxillae ; e, maxillipeds ; /, caudal extremity ; g, branchia. 



Near Vina del Mar, nine miles north of Valparaiso ; from pools of 

 water among the rocks of the sea-shore at low tide, where it occurs 

 concealed among the stones of the bottom. 



The head is longer than the following segment. The fourth epi- 

 meral is broad, but the fifth and following are quite narrow. The last 

 segment of the body has in the emargination of each apex a minute 

 spine, besides two or three on the outer margin ; the length of the 

 segment is a little greater than the breadth, and the form nearly rec- 

 tangular. The fourth abdominal segment has an indentation on the 

 back, and the fifth is shorter than the sixth or seventh. The third 

 pair of stylets extends rather farther back than the first pair, and 

 considerably farther than the second pair. Branches of third pair 

 oblong lanceolate ; of first and second, linear. 



The flagella of the antennae are very slender terete, and the joints 

 are but little oblong. The first two joints of the inferior pair are 



