368 CRUSTACEA. ' 



sixth and seventh equal ; coxae of seventh pair somewhat broader 

 than that of preceding. 



Plate 58, fig. 4 a, animal, much enlarged ; b, part of flagellum of 

 inferior antennae ; c, extremity of leg of first pair ; d, ibid, of second 

 pair ; e, ibid, of leg of fourth pair. 



Valparaiso. 



Length, eight lines. The setae of the flagellum of the inferior 

 antennae are not longer than half the breadth of the joints. The 

 hand of the second pair is about half as broad as preceding joint, and 

 much shorter ; it is broadest towards the extremity and rounded at 

 apex. The hand of the first pair is very short setulous below ; the 

 preceding joint is arcuate below, and furnished with five setae (or sets 

 of setae), the middle of which is the longer. 



We suspect that this may be the female of the 0. cliilensis of Ed- 

 wards (Crust., iii. 18) ; but males and females are so very different, 

 that it is impossible to be certain from a description of the male only. 

 Our specimens are all like the figures. 



Orchestia nttida. 



Epimerm mediocres, quintce quartis breviores. Antennm 2dce dimidio 

 corporis breviores, flagello longiore quam basis, moniliformis 12-14- 

 articulato, articulis parce oblongis, setis minutissimis. Antennce 1mm 

 dimidio basis secundarum parce longiores, flagello 6-articulato. Pedes 

 lmi parvuli, manu brevi, apice oblique truncato et latiore, carpo juxta 

 inanum infra gibboso. Pedes 2di validi, manu subovatd, palmd recta 

 vix excavatd, fere longitudinali, digito dimidio manus longiore. Pedes 

 4 sequentes subaequi; reliqui breviusculi, sensim increscentes, setis arti~ 

 culi 5ti semidiametro articuli multo brevioribus, articulo primo lato, mar- 

 gine subtilissimd serrulato. Ramus stylorum Imorum externus nudus. 



Epimerals of moderate size, fifth smaller than fourth. Inferior 

 antenna shorter than half the body ; last two of the basal joints 

 subequal, flagellum longer than base, moniliform, twelve to four- 

 teen-jointed, joints slightly oblong, setae very minute. Superior 



