1922. J 



S. L. Hora : Fish of Mountain Torrents. 



49 



In a vertical section of the skin (fig. n) covering the tip of 

 the snout, where scales are of course absent, the epithelial region 

 {ep.d.) is made up of a homogeneous mass of protoplasm with a 

 large number of nuclei scattered in it. The nuclei are aggregated 

 either near the base or near the apex of the epithelial region ; some 

 of them are surrounded by a white zone. Near the upper surface 

 are present a number of large ampulliform gland-cells (g.c). The 

 protoplasm of the gland-cells is restricted to the periphery or to 

 the base and the nucleus generally occupies the centre of the basal 

 protoplasm. In the middle of the homogeneous epithelial mass 



P.c. 



fcss^ff^ ---» &.v. 



TEXT-FIG. 11. — Transverse section of the integument of Garra annandalei 

 from the lip of the snout, x 435. 



ep.d. = epidermis ; d = dermis ; g.c. = gland-cell ; c.c. = clavate cell ; b.v. 

 blood vessel. 



are found big ,f clavate cells " (c.c.) forming as it were a distinct 

 row by themselves. Below the epithelium are blood vessels (b.v.) 

 whose walls stain rather deeply with eosin. Underneath the blood 

 vessels are a number of big cavities, which probably represent the 

 adipose tissue. The adipose tissue is said to be present below the 

 skin of most of the fishes, but its presence in this position between 

 the epithelial and dermal regions, is interesting. Below the fat- 

 cells is the connective tissue, which is marked by a large number 

 of nuclei which are not surrounded by a white zone. The cell- 

 boundaries in this region are not distinguishable. 



