976 



CRUSTACEA. 



apice birdentato, rnanu ultra hujus digiti basin parce productd; digito 

 elongato, articulo prirao paulo longiore, intus parce eroso et sparsim 

 breviterque setuloso. 



Superior antennae having the base about as long as the flagellum. 

 Hand of second pair of feet very large, oblong, dorsal and inferior 

 margins parallel, thumb short and bi-dentate at apex, hand pro- 

 duced but little beyond base of this finger; finger very long, the 

 first joint the longer, sparingly erose within, and bearing a few 

 minute and short setae. 



Plate 67, fig. 4 a, hand of second pair, enlarged; b, part of man- 

 dible, in one view ; c, caudal extremity of body ; d, caudal stylet of 

 last pair, in profile. 



Same locality as last. 



The moveable finger in this species is five or six times as long as 

 the immoveable finger, and has a bi-dentate apex; the immoveable 

 finger is not half as long as the distance from its base to the articu- 

 lation of the hand with the carpus. The finger closes up nearly as in 

 the preceding. There are a few short setae upon the outside of the 

 immoveable finger. The mandible has a three-jointed palpus, the 

 last joint of which bears a few short, scattered hairs. The stylets of 

 the first pair extend beyond the others ; the outer branch is narrow 

 lamellar, with three or four unequal setae at apex, and one or two a 

 little distance back ; the inner branch is slender styliform, and has a 

 single longish seta or spine at the extremity. The second and third 

 pairs are subequal, the third the shorter and much stouter at base. 

 There is a very short caudal segment (seventh abdominal) which has 

 its medial portion protuberant and of a triangular form, the parts out- 

 side of this with a few very short stiff hairs. The form of the first 

 joint of the fifth pair of legs is the same as in the rnacrodactylus. 



Erichthonius pugnax, Dana, Proc. Amer. Acad. Sci., Boston, ii. 213. 



Ptctilus BRASILIENSIS. 

 Feminae : — Epimerce sat breves. Margo capitis lateralis salie?is. Pedes 



