100 XII. Karel Scháfema: 



Tliis species was found by Prof. Dr. A. Mrázek in the 

 river Rijeka (Montenegro), very slowly running, near its 

 mouth into tlie S c u t a r i Lake. 



This form is very dosely related with Carinogammarus 

 SGutarensis mihi, but it lias a short conus excretorius on the 

 second aiiteima. 



C. G e n u s Niphargus Schiodte. 



1. Niphargus illidžensis n. sp. 



(PÍ. I, 11; text fig. 24, 25.) 



Eyes waiiting. On the top of the head an irregular and 

 yellow spot. Propodits oť the gnathopoda nearly quadran- 

 gular. On the coucave niargin of the peraeopoda short spi- 

 nules; the dactylopodit of the l^S "Á^^ and 3'"^ peraeopod with 

 4 spinules; the one of the 4^^ and 5^^ peraeon segment with 

 6 spinules. — The last two segments with strong dorsally 

 spinules. — The S''^ uropod not very long with a feeble ter- 

 minál segment. Lengtli 11 mm. 



I háve found this species in the springs of the 

 Bosna river near Illidže in Bosnia. 



2, Niphargus illidžensis forma dalmatína n. sp. n. f. 

 (PÍ. I., irp„ 3, 4; text fig. 24, 25.) 



Yellow spot on the head wanting, on the concave margins 

 of dactylopodits not so many spinules; on the one of the 1''^ 

 peraeon segment 4 spinules; on the 2'^^ 3 spinules and on 

 the 3'"^— 5^^ 2 spinules. 



In the chitinous tegument of the body very fine sensory 

 organs, with a casket excavation in the chitin, from which 

 there are very fine sensory hairs produced at the top in 

 three branches. Beside these organs there are other sensory 

 organs, the top of which is represented by a very fine little 

 brush. Niphargus illidžensis f . dalmatina is living in a very 

 small spring on the coast of the lake Vrána i n D a I m a t i a 

 near Zaravecchia. 



Both are dosely connected with Niphargus LadmirauUi 



((I^HEVREUX). 



