90 LIVERPOOL BIOLOGICAL SOCIETY. 
present no features of special interest. From even quite a 
superficial examination of the sections striking differences 
from the adult Anguts can be noticed. We see that the 
pineal eye of the young form is very flattened, and that 
the cavity between lens and retina has not yet made its” 
appearance. Another difference, although of secondary 
importance, is at once visible, the parietal bones are not. 
yet developed. Notwithstanding these differences one 
great similarity is noticeable, namely the complete con- 
nection of pineal eye and brain by means of the epiphysis. 
There is, as in the adult, a short thin stalk springing from 
the distal end of the epiphysis and spreading out to form 
the retina. By closer examination we find that the cells 
of the retina have not yet been differentiated to form 
the various layers which are present in the adult state. 
Instead of the one molecular and the two nuclear layers 
there is here only a single layer present, in which the cells 
are of rather embryonic character, and of the same nature 
as those of the epiphysis; they are small and rounded and 
have a rather large nucleus. The pigment layer resembles 
that of the adult Angwis, the only difference is, that in the 
young one the pigment cells are still more crowded so as 
to form an almost continuous layer of pigment. The 
retina is continuous with the circumference of the lens, 
without a definite boundary, and there is at that stage 
very little difference between the cells forming lens and 
retina. Only a few of the cells in the lens have become 
fusiform and resemble those of the adult Anguis, whilst 
the remainder are still more or less rounded. No doubt 
we ought to expect that all those cells would have become 
fusiform in the adult, but that process of differentiation 
seems to be rather slow. For, as I mentioned in describing 
the lens of the adult, I found there some cells which 
differed from the remainder, and were not fusiform, but 


