CRUSTAl^EA CVSPIA. 471 



pediincle, and is composed of about 20 articulations. Tlie accessory appendage 

 is somewhat longer than the last peduncula» joint, and 4-articulate. 



The inferior antennte are scarcely more than half as long as the supe- 

 rior, and of usual structure. 



The guatliopoda:'are veiy unequally developed, the anterior ones (tig. 20) 

 in tills species, contrary to what is usually the case, being much the stron- 

 ger. The propodos of this pair is very large and of oblong oval form, with 

 the palm somewhat oblique, though defined below by a distinct spinous cor- 

 ner. The posterior gnathopoda (fig. 21) are exceedingly slender, with botli 

 the carpus and propodos ratlier elongated, and edged witli dense fascicles of 

 slender bristles. The propodos is about the length of the carpus, and very 

 narrow, sublinear, and with the palm extremely short and nearly transverse. 



The 2 anterior pairs of pereiopoda are rather slender, and normally 

 developed. 



Tlie 3 posterior pairs are moderately elongated, and distinguished by 

 the basal joint being in all of them rather broad and expanded, with the 

 iufero-posteal corner produced also in the penultimate pair (fig. 22). The 

 basal joint of the last pair (fig. 23) is much Inrger than that of tlie 2 pre- 

 ceding pairs, and has the posterior expansion obtusely truncated below. 



The last pair of uropoda (fig. 25) are of considerable length, being even 

 somewhat longer than the urosome, and have the outer ramus sub-linear in 

 form, with several fascicles of slender spines on each side. Its terminal joint 

 is rather small and spiniform. 



The telson (fig. 26) is of moderate size, the cleft somewhat widening 

 posteriorly. The lateral lobes are obtusely pointed at the tip, and carry 

 each a rather strong lateral spine and 3 somewhat smaller apical ones. 



Occnrrcnce. — The above-described specimen was taken last year by 

 Mr. Andrussow, at Krasnowodsk. 



Gen. Niphargoides, G. 0. Sais. 



In my 2nd article on the Caspian Amphijjoda, I mentimied that a new 

 species of this genus was contained in the collection of Dr. Grimm. This 

 form is described below, and increases the species, as at present known, to 

 6 in all. 



22. Niphargoides Grimmi, G. (). Sars, n. sp. 



(PI. 11, figs. 1—12). 



Specific Characters. — Form of body about as in N. cnsph(S. Lateral 

 lobes of cephalon somewhat projecting and narrowly rounded. Anterior jiairs 



*B3.-MaT. CTp, 301. 51 32* 



