430 0. 0. SARS, 



The 3 posterior pairs exhibit the structure characteristic of the genus, 

 and are rather unequally developed, the penultimate pair being much more 

 elongated than the other 2, and generally strongly reflexed. The basal joint 

 on this and the preceding pair is rather narrow, and somewhat tapering dis- 

 tally; whereas on the last pair (fig. 7) it is extremely large and expanded, 

 being fully as long as the remainder of the leg. The shape of the joint 

 somewhat differs from that in the other 2 species, being more regularly 

 rounded oval, with the posterior edge quite evenly curved and densely 

 fringed with ciliated setse. 



The uropoda and telson do not seem to differ materially from those parts 

 in the 2 other species. 



Occurrence. — Of this species 2 specimens, the one imperfect, are con- 

 tained in the collection of Dr. Grimm, having been taken, according to the 

 label, at St. 108, belonging to the middle part of the Caspian Sea, the depth 

 ranging from 80 to 90 fathoms. 



Fam. GAMMAKIDiE. 



Gen. Gmelina, Grimm. 



Of this genus, established by Dr. Grimm, 2 species have been described 

 by the present author in his 1st article on the Caspian Amphipoda. Two 

 additional species are now added, and will be described below, both of them 

 easily distinguishable from the 2 first recorded. 



4. Gmelina laeviuscula, G. 0. Sars, n. sp. 



(PI. 2, figs. 8—12). 



Specific Characters. — Body moderately slender and nearly smooth, 

 without any distinct tubercles or dorsal expansions, though having the seg- 

 ments rather sharply marked off from each other. Cephalon with the lateral 

 faces quite smooth, lateral lobes narrowly rounded in front. Anterior pairs 

 of coxal plates (in male) but little deeper than the corresponding segments, 

 and of the usual shape. Last pair of epimeral plates of metasome but slightly 

 produced at the lateral corners. Urosome with a few small hairs above at 

 the end of each segment. Eyes very small, rounded oval. Antennae of the 

 usual structure. Gnathopoda (in male) rather powerful. Pereiopoda nearly 

 as in the 2 first described species. Last pair of uropoda very robust, though 

 not attaining the length of the urosome, outer ramus unusually broad, folia- 

 ceous, and densely fringed with fascicles of slender spines, inner ramus less 



$H3.-MaT. CTp. 260. lO 



