446 Journ. of the Asiat. Soc. of Bengal. [Nov. & Dec. 1915. 
sent noted the existence of a few spiny spicules among those 
of the skeleton. His specimens were from Lake Huleh and the 
R. Barada. I did not find any such spicules in sponges from 
the Lake of Tiberias and under ordinary powers of the micro- 
scope such as I usually employ in examining spicules of: the 
kind, all the skeleton-spicules appeared to be perfectly smooth. 
Having had occasion recently, however, to re-examine my 
cal H. fluviatilis from Europe, of the race capensis, of E. ja- 
and this is also the case with the genus Cortispongilla. 
e most interesting point, geographically, about the 
Potamolepidine sponges of the Lake of Tiberias is that they 
appear to represent a true lacustrine fauna and that their 
one that persisted for a long period (see . 469 postea). : 
., J only species of Coelenterate found in the lake 18 
identical with the common European Hydra viridis, a species 
of wide distribution in the Holarctic Zone, but not authorita- 
tively recorded from any tropical locality. 
Turbellaria. 
The three species of this : Tibe- 
i group found in the Lake of i 
nae al belong oe cosmopolitan genus Planaria and are 
, 
| 
. 
