64 MORRILL. [VoL. XIV. 
When examined with high powers, the dark varicosities of 
the nerves could be distinguished. He concludes after careful 
examination that the granular mantle had no connection with 
the nerve fibers: ‘“ Mit Nervenfasern zeigten sie keinen 
zusammenhang.” 
Geberg ('92) found both kinds of nerve endings: one free in 
knob-like enlargements at the surface between the hair cells, 
and the other in nerve fibers attached to the surface of the cells, 
but not continuous with them. 
Retzius ('92) did not obtain satisfactory results with Ehrlich’s 
method, but with Cajal’s modification of Golgi’s method used on 
embryonic or very young chickens and mice he secured good 
results. In comparing auditory hair cells and olfactory nerve 
cells, he says: ‘ Die Haarzellen sind deshalb keine Nervenzellen 
sie sind den Riechzellen keinwegs gleichzustellen.” 
The bipolar ganglion cells of the acusticus are considered by 
him to be the true auditory nerve cells and correspond with the 
olfactory nerve cells. In numerous preparations he never saw 
a nerve fiber arising from a hair cell. The hair cells he classes 
as secondary sensory cells. 
Retzius, who had previously described a structure similar to 
the hyaline cup observed by Kaiser connecting the nerves and 
hair cells, does not accept the latter’s view in regard to its 
nature. In 1893 Retzius confirmed his earlier observations by 
the study of rat and trout embryos. In this publication he 
states that he does not always find Kaiser’s cup-like structure 
present. 
In the rat the hair cells were seldom stained, and then were 
of a clear chestnut-brown color, which did not interfere with the 
study of the relation of the nerve fibers and hair cells. 
Van Gehuchten’s results, obtained wholly independently of 
Retzius, were almost exactly the same in the main points. 
Lenhossék ('94) found in his study of the auditory epithelium 
of young mice that supporting cells were frequently stained a 
deep black with the Golgi method, while the hair cells when 
stained at all were of a clear brown color. As Retzius had 
previously observed, he saw the deep black nerve fibers clearly 
outlined on the surface of the hair cells. He did not find the 
