Vol. IX, No. 6.] Crustacea Decapoda of the L. of Tiberias. 247 
[N.S.] 
secondary sexual character is apparent. We have ourselves 
amined four males and three females. 
The colour in life is of a uniform dead white, neither 
opaque nor transparent but rather translucent, resembling that 
of paraffin wax or, more accurately, that of the opalescent 
glass of which lamp-shades are often made. There is no trace 
of external pigmentation ; the partial opacity is inherent in the 
muscles, the integument being perfectly transparent. The 
stomach and the liver can be detected externally as dark 
irregular masses. 
dead matter to aid in concealing the animal, which is a most 
conspicuous object in its natural surroundings. 
So far as it is possible to ascertain from the most careful 
enquiries on the spot, 7'yphlocaris is only found in the octagonal 
pool at et-Tabghah called Birket ‘Ali-ed-Dhaher, in which it has 
long been known to the Bedouins of the district as ,4¥ Y yi! 
or ‘‘ white scorpion.’? The pool (pl. XIII) has recently been 
described in this Journal and the water analysed!; all that we 
need say here is that it is a small artificial pool contain- 
ing from six to ten feet of brackish and sulphurous water and 
about 58 metres in circumference; that it now has no direct 
communication with the Lake of Tiberias, close to the shore of 
which it is situated, but that a connection of a sort, perhaps 
bd 
artificial, existed in historic times. It must be fed by a subter- 
was rooted at the edge, but sent out long floating stems. NO 
other phanerogamic water-plants occurred and the fauna, 
one species of fish (Discognathus lamia rufus, Heckel) =a two 
of Mollusca? (Bithinella spp. nov.) were seen and no examples fe 
Atyaephyra could be discovered, notwithstanding a very care 
examination of the floating grass. 
n its movements T'yphlocaris closely resembles phe gets 
but is rather more sluggish than any Indian species 0 of 
genus with which we are acquainted. Asa rule it gehen 
on the bottom, partly by means of its walking legs ee a hie 
by the use of its swimmerets, the abdomen being rais - oe 
but their 
' Christie, Journ. As. Soc. Bengal, 1913, p 
, p. 25. 
2 For this determination we are indebted to Mr. H. B. Preston. 
