84 ‘Trans. Acad. Sci. of St. Louis. 
After a somewhat lengthy description of the different 
membranes of the eye of Z'yphlotriton, in which I find 
also the statement that no bloodvessels enter the eye, he 
summarizes as follows: 
‘‘1, The eye lies just beneath the skin. The skin is but 
little thinner over the eye than elsewhere and shows no 
structural characters different from those of the neigh- 
boring regions. 
2. The eye muscles have vanished. 
3. The lens has vanished and its place has in part 
become filled by an ingrowth of choroidal tissue contain- 
ing pigment. 
4. The vitreal body is very small, if present at all. 
The vitreal cavity is a funnel-shaped space. 
5. The pigment layer of the retina is a pavement epi- 
thelium with indistinct cell boundaries, and with occa- 
sional pigmented processes extending into or through 
the nuclear layers. 
6. Rods and cones are not formed. 
7. The outer reticular layer has disappeared. 
8. The inner and outer nuclear layers form one layer, 
eells indistinguishable from each other. 
9. The inner reticular layer, as usually with degen- 
erate eyes, is relatively well developed. 
10. The ganglionic layer is well represented and con- 
nected with the brain by the well developed optic nerve, 
ete.’”’ 
When reading this, after having myself examined a 
number of specimens of J'yphlotriton eyes, I could not 
understand how such a deseription was possible. Surely, 
in my specimens of Typhlotriton, the crystalline lens, for 
instance, which Higenmann said had vanished, was one 
of the most prominent features, and there were numerous 
other discrepancies. 
A little later I came into possession of a second paper 
written by Carl H. Kigenmann together with W. A. 
Denny, entitled: ‘‘The eyes of the blind vertebrates of 
North America. III. The structure and ontogenetic 
