1878. ] The Sensory Organs. 581 
researches point to that conclusion; that the fibres of the auditory 
nerve do not end in loops, that they do not become continuous 
with the blunt-ended cylindrical nor the stellate cells. The only 
remaining element is, therefore, the hair-cell, and this in every 
way supports the view of its nervous connection. It not only 
becomes stained with osmic acid (Waldeyer, Stricker’s Hdb.), 
similar to nerve fibres, but its central process presents the same 
appearance as the latter. In 1868, Hasse (Z. f. W. Z., Bd. xviii) 
investigated the ear of the frog, and strongly expressed the same 
view as maintained by the previously mentioned authorities; in 
fact, in one instance he believes to have really seen the nerve ter- 
minating in the hair-cell (stabchenzelle), but does not lay too much 
stress upon it. Waldeyer, 1868 (Stricker’s Hdb.), claims the 
nervous continuity of the inner hair-cells of Corti’s organ as a 
positive fact. He says, “the inner radial (nerve) fibres pass, as I 
have often been able to prove, directly through the granular layer 
and terminate in the pointed ends of the inner hair-cells.” Gott- 
stein, 1872 (A. f. M. A.), like Waldeyer, says, that the inner radial 
nerve-fibres enter the inner row of hair-cells, while the outer are 
supplied by fibres stretching directly across the, tunnel formed by 
Corti’s arch. Ladowsky, 1876 (A. f. M. A.), expresses emphati- 
cally the same conclusions maintained by Gottstein. He asserts 
notwithstanding the purely negative results of Nuel (A. f. M. A. 
viii), the nervous connection of the hair-cells strenuously as fol- 
lows: “I assert, along with Boetcher, that the connection between 
nerves and cells can nowhere be demonstrated so clearly as in the 
EAN ss. Boetcher says, that he could, with some animals, 
as the hedgehog, find the connection of the nerves with the end- 
cells in almost every section.” 
The Organ of Smell——This, when analyzed, appears likewise to 
consist of a cell with a central and a peripheral process. The 
‘outline of the literature is as follows: 
In 1857, Ecker described the epithelium of the olfactory 
region (Z. f. W. Z. Bd. viii), but did not claim any nervous con- 
nection with cells. Later investigators, however, J. L. Clark and 
Max Schulze, strongly advocated the view of the direct nervous 
- Continuity of the so-called “olfactory” cells. Clark, 1862 (Z. f. 
= W. Z. Bd. xi), traced the nerves into a fine sub-epithelial plexus, 
and thence believed them to become continuous with the central 
_ Processes of these cells. Max Schultze, 1863, (Abde. dQ. 
