CRUSTACEA CASPIA. 363 



beyond the ischial joint. Last pair of uropoda nearly as in G. robitstoides. 

 Telson somewhat broader than it is long, each half with only 2 apical spines. 

 Length of adult female 11 mm., of male 12 mm. 



Remarks. — The present species, established by Dr. Grimm, is nearly 

 allied to G. robustoides, differing, however, in the still stouter form of the 

 body, the different armature of the urosome, the structure of the gnathopoda 

 and the large size and peculiar form of the basal joint of the last pair of 

 pereiopoda. It is also rather inferior in size. 



Description of the reniaie. 



Adult, ovigerous specimens scarcely exceed 1 1 mm. in length. 



The body (see fig. 1) is of a still shorter "and stouter form than in G. 

 robustoides, being rather tumid, with broadly vaulted back, and the species 

 thus fully deserves the specific name proposed for it by Dr. Grimm. 



The cephalon about equals in length the first 2 segments of the meso- 

 some combined, and has the lateral lobes rather projecting and obtusely 

 rounded at the tip, being defined behind by a rather deep emargination. 



The anterior pairs of coxal plates are of moderate size, and have their 

 distal edge slightly crenulated and fringed with scattered bristles. The 1st 

 pair (see fig. 4) are very slightly expanded distally, and are obtusely rounded 

 at the tip. The 2nd pair (see fig. 5) have the distal edge somewhat oblique, 

 whereas the 3rd pair are more regularly oblong quadrangular in form. The 

 ■4th pair (see fig. 6) are rather broadly expanded in their outer part, though 

 scarcely as broad as they are deep. Their distal edge is smooth in the 

 middle and passes both into the anterior and posterior edges in an even 

 curve. 



The epimeral plates of the metasome are well developed, and the last 

 2 pairs acutely produced at the lateral corners. The urosome is of moderate 

 size and does not exhibit any dorsal prominences. The 1st segment has 

 dorsally a fascicle of delicate bristles but no spines. The last 2 segments, 

 on the other hand, are armed on either side of the dorsal face with one or 

 two small spinules. 



The eyes are of the usual oval renifonn shape, and have the visual 

 elements well developed and the pigment dark. 



The antennae are comparatively short, though perhaps a little more 

 elongated than in the preceding species, and are not very different in length. 

 The superior ones (fig. 2) do not nearly attain to % of the length of the body, 

 and have the 1st joint of the peduncle rather large, being fully as long as 

 the other 2 combined. The flagellum is very slender and considerably longer 



4'fl3.-MaT. CTp. 343. 21 



