374 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Lyon, Ehrlich’s stain and picric acid-fuchsin, and Ehrlich’s stain and 
Orcein; impregnation after Bielschowsky was also used. 
The results at which I have arrived after studying these microscopi- 
cal preparations are entirely different from those which Gadow pub- 
lished in his paper already referred to. Each appendage consists of 
an inner cutis papilla and an epidermal outer layer of very peculiar 
appearance. ‘This outer layer is made up of many longitudinal ridges 
of epidermis cells, between which are found deep longitudinal grooves. 
These grooves are filled with the cutis tissue. In transverse section 
(Fig. A) this condition is very conspicuous, reminding one somewhat 
of the transverse section of a developing feather. 
The stratum corneum is not thick, but quite distinct, and outside 
this is still another continuous external layer of horny cells, which 
form a kind of loose covering, thus indicating that these appendages, 
Fig. A. Transverse section of one of the hair-like appendages. 6, blood vessel; 
c, cutis; e, epidermis. 
Fig. B. Portion of a longitudinal (radial) section of hair-like appendage, showing 
tactile cells in one of the cutis ridges. ch. chromatophore; e, epidermis cells; h, 
stratum corneum; n. nerve fibre; fc. tactile cells. 
like the rest of the skin, periodically slough their superficial stratum 
corneum. ‘This statement does not agree with Gadow’s sentence: 
“Die Epidermis ist weich und weder besonders verdickt noch irgend 
wie verhornt.”’ On the other hand, I was not able to find the great 
number of glands which Gadow describes; at least, they are not more 
numerous than in other parts of the skin. 
