EYES OF CHRYSOCHLORIS HOTTENTOTA AND GC. ASIATICA. 337 
investigated in order of degeneration, we find that the adults 
of C. hottentota and C. asiatica are the least degenerate, 
the intermediate stage of C. asiatica being the most 
degenerate in nearly every respect. 
The eye of Chrysochloris is, without doubt, of no use for 
vision, even were the eye-cleft at the proper angle to admit 
light-rays in the proper direction, i.e. along the optic axis, 
and it is improbable that even degrees of light can be detected 
by it. At this stage of degeneration the gland secretion can 
have only its usual function of keeping the conjunctival cavity 
free from foreign matter. 
BIBLIOGRAPHY. 
Higenmann,C.H. 1899(!).—‘*The Hyes of the Blind Vertebrates of North 
America: I. Amblyopside,” ‘Archiv fiir Entwickelungsmechanik der 
Organismen,’ Band viii, Heft 4, 1899. 
1899(?).—*The Eyes of Typhlomoge rathbuni, Stejneger,” 
contributions from the Zool. Laboratory of Indiana University, No. 29, 
‘Trans. Amer. Micr. Soc.,’ vol. xxi. 
1902.— The Eyes of Rhineura floridana,” ‘ Proc. Wash. Acad. 
Sci.,’ vol. iv. Sept., 1902. 
Kout, C. 1892.—* Rudimentire Wirbelthieraugen,” ‘ Bibliotheca Zoologica,’ 
Bd. v, Heft 13, 1892. 
— 1893, 1895.—*‘ Rudimentare Wirbelthieraugen,” ‘ Bibliotheca Zoo- 
logica,’ Bd. v, Heft 14, und W. Nachtrag, 1893, 1895. 
StonakerR, J. R. 1902.—‘* The Eye of the Common American Mole 
(Scalops aquaticus machrinus),” ‘Journ. of Comparative Neu- 
rology,’ vol. xii, 1902. 
Sweet, G.—“ Contributions to our Knowledge of the Anatomy of Noto- 
ryctes typhlops, Stirling: Part IIL. The Eye,” ‘Quart. Journ. 
Mier. Sci.,’ voi. 50, part 4, Nov., 1906. 
I regret that I have been unable to consult any literature on Chirysochloris 
other than one or two purely systematic papers, the valuable work done by 
other workers on this animal not being obtainable in Australia. 
