CRUSTACEA CASPIA. 371 



(St. 16) located off the island Swjatoj, the 2nd (St. 40) off the promontory 

 Brauska^a, and the 3rd (St. 61) lying far north, outside the Bai Bogatui 

 Kultuku, ■ -^ 



Dr{ Grimm's collection contains several specimens of this form, col- 

 lected in quite shallow water, partly at Baku, partly at the mouth of the 

 river Siargudschy. 



■^ Gen. 5. Niphargoides, G. 0. Sars. 



Syn.: Niphargus, Grimm (not Schodte). 



Generic Characters. — Body smooth and of a very robust form, with 

 the coxal plates not very large, and more or less densely setous on their 

 distal edge. Cephalon comparatively small and without any rostrum, lateral 

 lobes more or less projecting. Eyes distinct, though generally not very large. 

 Antennse extremely short and stout, equal-sized, and more or less densely 

 setous, the superior ones provided with a distinct accessory appendage, and 

 having their outer part, as a rule, extended laterally. Mandibular palps 

 large, and generally densely setous. Oral parts otherwise normal. Gnatho- 

 poda strongly developed and of same appearance in the two sexes, though 

 rather differing in shape in the different species, both pairs distinctly sub- 

 cheliform. Pereiopoda rather strong aud more or less densely clothed with 

 bristles, basal joint of last pair much larger than that of the 2 preceding 

 pairs. The 2 anterior pairs of uropoda comparatively strongly built, with 

 the rami subequal; last pair not very large, with the inner ramus squarai- 

 form, the outer more or less densely setiferous, and having a very small 

 terminal joint. Telson divided by a deep and narrow cleft into two halves 

 spinous at the tip. 



Remarls. — This genus is founded upon the form recorded by Dr. Grimm 

 under the name of Niphargus caspiits. In his treatise on some blind Amphi- 

 poda of the Caspian Sea, this author observes, that the above-named form 

 might perhaps be more properly regarded as the type of a separate genus, 

 differing, as it does, in some points rather conspicuously from the known 

 species of the genus Niphargus, Schodte, though he believes that there is, 

 in a genealogical sense, a near relationship between the two. In my opinion, 

 the Caspian form ought, indeed, to be far removed from the genus Niphargus, 

 to which in reality it does not exhibit any very close affinity, nearly all the 

 appendages being very differently constructed. As I wish, however, to make 

 as little change as possible with the names proposed by Dr. Grimm, I have 

 substituted for the generic name Niphargus that of Niphargoides. In their 

 outward appearance, the species of this new genus exhibit a much closer re- 



*ll3.-lIaT. CTp. 351. 29 24* 



