CRUSTACEA CASPIA. 365 



large and tumid. In the anterior ones (fig. 1 4) the propodos is considerably 

 narrower and obpyriform in shape, being scarcely more than half as large 

 as that of the postet-ior. In both pairs the palm is rather oblique, and armed 

 in the middle, outside, with a strong spine, in addition to those occurring 

 on the inferior corner. 



Occurrence. — Of this form numerous specimens were collected by 

 Mr. Warpachowsky at Stat. 49, lying between the islands Kulaly and 

 Morskoy. It also occurred, though more sparingly, in 5 other Stations (16, 

 21, 32, 54, 55) distributed over about the same tract of the North Cas- 

 pian Sea. 



In the collection of Dr. Grimm this species is rather abundantly repre- 

 sented, but only a single bottle, containing 3 very small and somewhat de- 

 fective specimenstakenfromtheconsiderabledepthof 108 fathoms, bears the 

 name of the species. The other specimens were collected in comparatively 

 shallow water, partly at Baku, partly on the west coast of Sara, and partly 

 near the mouth of the river Surgudschy. 



15. Gammarus abbreviatus, G. 0. Sars, n. sp. 



(PI. XIV). 



Specific Cliaracters. — Body short and robust, being rather tumid in 

 the female. Lateral lobes of cephalon slightly prominent and broadly rounded 

 at the tip. Anterior pairs of coxal plates of moderate size, and having their 

 distal edge conspicuously crenulated and fringed with rather long bristles ; 

 1st pair obliquely expanded distally; 4th pair very large, being fully as 

 broad as they are deep. The last 2 pairs of epimeral plates of metasome 

 acutely produced at the lateral corners. Urosome smooth above, with one 

 or two very small spinules on the dorsal face of the 2 posterior segments. 

 Eyes oval reniform. Antennae unusually short; the superior ones not attain- 

 ing the length of the inferior, but having the 1st joint of the peduncle very 

 large, flagellum about the length of the peduncle, accessory appendage 4 — 

 5-articulate. Gnathopoda in female not very strong, propodos in both pairs 

 nearly of same form, with the palm rather oblique; those in male, as usual, 

 much stronger and more unequal, the posterior ones being much the larger. 

 Anterior pairs of pereiopoda very robust and densely setiferous; the 3 post- 

 erior pairs considerably more slender, basal joint of last pair regularly oval 

 in form, with the infero-posteal corner slightly produced and narrowly 

 rounded. Last pair of uropoda nearly as in the 2 preceding species. Telson 

 fully as long as it is broad, each half with 3 apical spines. Length of adult 

 female 12 mm., of male 13 mm. 



$n3.-MaT. CTp. 345. 23 



