STUDIES ON THE DIGENETIC TREMATODES. 483 
out of the excretory system are not mentioned by Jagerskidld 
I have endeavoured to utilise the table of specific differences 
given by Jagerskidld!, but without any consistent result. 
From the point of view of the comparative length of the 
pre-pharynx, for instance, my specimens from Totanus and 
Vanellus ought to be regarded as L. propinqua but the 
identity is not confirmed in other respects. For the present it 
seems the safest plan to refer my specimens from Pelidna, 
Ajgialitis and Totanus to Levinsinella brachysoma 
(Crepl.), while those from Hematopus and Vanellus 
must be regarded as Levinsinella sp. inquir. The most 
curious feature about the latter is the fact that on no occasion 
did I find a fully mature specimen, although [ examined 
several of these birds at different times. In addition to the 
foregoing hosts I have also to add Numenius arquata, in 
the czca of which I have found a Levinsinella sp., 
probably L. brachysoma. 
Sub-family Tocotremine Jigerskidld, 1902. 
Genus Tocotrema Looss, 1899. 
Tocotrema jejunum Mihi (PI. 10, figs. 20 and 21). 
I have not yet again met with this species. ‘T'wo figures 
of it are shown here, one representing what may be regarded 
as the normal shape, the other that in which it was usually 
found. 
Genus Cryptocotyle (lithe) Mihi, 1907. 
Cryptocotyle concava (Crepl.) (PI. 10, figs. 24 and 25). 
My revised definition of this genus requires alteration in, at 
least, one point. From a rather poor series of sections I 
have been able to make out that the genital sucker contains 
a distinct plug-shaped body (‘‘kegelférmiger Kérper”). It 
is, however, much smaller than the corresponding structure 
WOp,e16.. p> 147, 
