476 CRUSTACEA. 



GENUS JEGLEA, Leach. 



The following are the essential characters of this genus. 



Body much depressed. Carapax elongate ovate, narrow anteriorly 

 and short rostrate, with orbit-excavations either side of beak. Abdo- 

 men partly inflexed ; pairs of appendages in male obsolescent, in 

 female oblong. Antennae of second pair without a basal scale or 

 acicle ; of first pair without fossettes, situated posterior to the eyes. 

 Anterior feet stout chelate ; six following similar, pediform ; fifth pair 

 small and slender, obsoletely chelate, inflexed under the carapax. 



The antennae of the second pair in an upper view of the animal, pro- 

 ject from beneath the anterior angles of carapax, towards the extre- 

 mity of the beak, before reaching which, the flagellum arises and ex- 

 tends forward and outward. The base is four-jointed, the second and 

 third joints quite short, and each triangular in one vertical section, 

 the outer side of the second, and the inner of the third being ex- 

 tremely short. 



The mandibles have a trenchant longitudinal edge, which is a little 

 dentated. Exterior maxillipeds narrow pediform. 



Branchice, eleven on each side in a uniform series, excepting the 

 fifth and seventh, which are much smaller than the adjoining; they 

 consist of long, slender, cylindrical vessels, arranged thickly on one side 

 of a curving pedicel. Anterior legs unequal. 



Fifth pair of legs quite small, flexed, and concealed below, six- 

 jointed. At base in male an oblong process, which appeared to be 

 sexual. 



No abdominal legs to first segment ; on the following joints in male, 

 they are extremely small, two-jointed ; in female, long and slender. 



Abdomen seven-jointed ; the first segment very short, and narrower 

 than the following ; the following four similar, the first largest, last 

 segment subtriangular. 



L^EVIS (Latreille), Leach. 

 Plate 30, fig. 6 a, animal, natural size; Z>, carapax, showing sutures, 



