X02 XII. Karel Scháferna: 



II. Zoogeographical part. 



1. The occurence of Carinogammarus roeselii (Ger v.), 



triacanthns m i h i and scutarensis m i h i. 



Carinogammarus roeselii are wantino: in the upper di- 

 strict of the river Elbe (Bohemia), but they are oc- 

 curring often in the upper district of the Danube in 

 Mor a via, where this form has foiind not so many obsta- 

 cles with regard to its geographical distribution as in the 

 Elbe district. 



Carinogammarus triacanthus, which is living only in the 

 Scutari lake, could perhaps not surmount the high mountains. 



Carinogammarus scutarensis is a very young form eoming 

 from the Adriatic sea of the relation of Carinogammarus 

 pungentiformis. 



2. Geographical distribution of Carínogam,marus 

 thoni mihi and the notes to the distribution of 



the genus Carinogammarus. 



Carinogammarus thoni lives in the brackish water, in 

 the springs Slano vřelo and Lukavac in Hercego- 

 vina. But it is not easy to decide if this species occurring in 

 these springs is a relict of the former sea in the questioned 

 region, or if it is entering there still today through the sub- 

 terranean runs, which are connected with the sea. 



The most of the species of the genus Carinogam- 

 marus are the relicts from the former sea: the most of them 

 live in the Bajkal Lake, in the Caspian sea and in 

 the district of the Behringchannel. 



The members of the questioned localities are grouped 

 to the different cycles, so that we can speak of a cycle of 

 Behring channel, of the Bajkal Lake, of Ponto- 

 k a s p i e n and— last not least — of that of the Adriatical 

 region. 



3. The relation between Carinogammarus pungen- 



tiformis mihi and Gammarus pungens E d w. 



The euryhalin Carinogammarus pungentiformis are li- 

 ving in the sea, in the brackish and f reshwater (C a n a 1 e 



