49. The Planarians of the Lake of Tiberias. 
By R. H. Wuirrnovuss, M.So., Queen’s University, Belfast. 
Communicated by Dr. N. ANNANDALE. 
(Plate XXVI). 
. One o 
them, Planaria tiberiensis, was obtained in three localities, viz. 
from ‘‘a small brackish spring running into the lake near 
and from ‘‘a pool near Ain-et-Tineh, under stones.’’ 
second species (Planaria salina) was obtained from ‘‘ the lower 
surface of stones in saline water near et-Tabghah’’; while the 
third (Planaria barroisi) was taken from the edge of the Lake at 
Tiberias. 
year they lack sexual organs and reproduce by fission. Thus 
when only non-sexual individuals are available, their identifica- 
ays remain uncertain, and the matter cannot be 
finally settled until periodic observations can be made. 
of the animals in this collection were non-sexual, and 
thus their identification is at present only provisional ; but it 
is hoped that the descriptions and figures given will be a useful 
foundation for any future periodic work that may be attempted 
at the Lake of Tiberias. 
Planania tiberiensis, n. sp. (Pl. xxvi, figs. 1 to 4.) 
This species was collected in three localities, two near 
Mejdal and one near Ain-et-Tineh. The only difference 
between the animals from these collections was that the ees 
ity taken from the spring at Mejdal were smaller than in the 
other collections, which merely indicated that most of them 
were younger specimens. i 
e a length of the animals from the brackish 
trunk 13mm ‘ ‘ 
when apparently full grown. The specimens from the spring 
