ON THE HISTOLOGY OF THE EYE OF TYPHLO- 
TRITON SPELAEUS, FROM MARBLE 
CAVE, MO.* 
ApoLF ALT. 
When through the kindness of Mr. J. Hurter of this 
city an opportunity was offered to me to make the his- 
tological examination of the eyes of a number of speci- 
mens of Typhlotriton spelaeus of Marble,Cave, Mo., I 
was at first not in possession of any previous literature 
on the subject, nor did it seem possible to get hold of 
it, since a personal letter to Dr. Carl H. Higenmann 
remained unanswered. ‘Through the kindness of Pro- 
fessor A. C. Eycleshymer of the St. Louis University 
IT have of late recgived a number of reprints on this 
subject.’ Aside from one paper written together with 
-another author, as far as I ean find, it is Carl H. Kigen- 
mann’s own work which alone treats on the structure of 
the eyes of this so-called blind salamander. 
What appears to have been the first description by 
this author is a paper published in the twenty-first volume 
of the Transactions of the American Microscopical 
Society, 1900, under the title ‘‘The eyes of the blind 
vertebrates of North America, II. The eyes of T'yphlo- 
molge Rathbumu, Stejneger.’’ In this paper he says, 
after a short description of the eyes of Typhlomolge, 
‘““The eye of Typhlotriton is, in many respects, much 
more degenerate than that of its European caverniculous 
relative, Proteus.’’ When reading this it seemed some- 
what strange to me that the larger part of a paper on 
the eyes of Typhlomolge Rathbuni should be taken up by 
a description of the eyes of T'yphlotriton, but there it was 
in print and could not be doubted. 
* Read and illustrated with numerous lantern slides before The Academy 
of Science of St. Louis, March 21, 1910. 
: (83) 
