39- Amphipoda and Isopoda from the Lake of Tiberias. 



By Walter M. Tattersall, D.Sc, Manchester Museum. 



(Communicated b;/ Dr. N. Ann and ale.) 



I am indebted to Dr. Annandale for the opportunity of 

 examining a small collection of Amphipoda and Isopoda made 

 by him in October, 1912, in and near the Lake of Tiberias. 



Dr. Annandale's immediate purpose was an investigation 

 of the fauna of the lake itself and consequently no special 

 attention was paid to the terrestrial fauna. As a result, but 

 one specimen of a true terrestrial woodlouse is contained in 

 the present collection. The latter comprises otherwise three 

 species of Amphipoda and three of Isopoda, all of which 

 are either completely or partially aquatic in habit. Our 

 knowledge of the Amphipoda and Isopoda of Palestine is 

 derived mainly from the collections made there by Dr. T. 

 Barrois and described by Dollfuss, 1892 (Isopoda) and 

 Chevreux, 1895 (Amphipoda). A small collection of Isopoda 

 collected in the same country by Dr. Festa and described 

 by Dollfuss (1894) practically confirmed that made by Barrois, 

 only one species not being found in the latter collection. 

 Dr. Festa does not appear to have collected any Amphipoda, 

 at least I am not aware of any published account of them. 

 Lortet (1883) recorded the first Amphipoda found in the lake 

 and described them as a new species of Orchestia, 0. tiberiadis, 

 but later research has shown that his name must be regarded 

 as a synonym of the earlier species, 0. platensis, Kroyer. 



Dr. Annandale's collection contains nothing new but 

 adds one species, Philoscia couchii, to the fauna of Syria. Other- 

 wise it serves to confirm the earlier collections of Barrois and 

 Festa and, as far as the aquatic and semi-aquatic Amphipoda 

 and Isopoda are concerned, it does not seem likely that any 

 new forms remain to be discovered. 



The collection comprises the following species : 



Amphipoda. 



Gam/mar us pungens, M.-Ed. 

 Gammarus syriicus, Chevreux. 

 Or chest ia platensis, Kroyer. 



Isopoda. 



Asellus coxalis, Dollfuss. 



Philoscia couchii, Kmahan. 



Leptotrichus, sp. 



Metoponorthus swammerdami, Aud. & Sav 



