NERVE TERMINATIONS OF THE TADPOLE. 69 
38. One, commonly two, often three or more, nerve- 
fibrils terminate in the interior of each epithelial 
cell near its nucleus. 
4. The figures of Eberth are sheaths for intra- 
cellular nerve terminations. 
EXPLANATION OF PLATE VI. 
Illustrating Mr. A. B. Macallum’s Paper on “The Nerve 
Terminations in the Cutaneous Epithelium of the Tadpole.” 
In drawing Figs. 1 and 2, Hartnack, obj. 7, and Oberhauser’s camera were 
used, and the position and course of the nerve-fibrils were determined with 
Zeiss’s hom. imm. th. For all the other figures, Hartnack, oc. 4 and obj. 7, 
were employed. 
Fic. 1.—A vertical section of the skin of the tail of the tadpole, showing :— 
a. Corium. &. Basal, c. intermediate, and d. superficial cells of the epithe- 
lium. e. Figure of Eberth. 2. An intracellular, x’, an intercellular nerve 
termination. 2”. A nerve-fibril, passing through the corium and entering a 
figure of Eberth. Erlicki’s fluid, nigrosine, saffranine. 
Fic. 2.—A similar preparation, showing the epithelium and figures of 
Eberth highly developed. 
Fic. 3.—Cells of the superficial layer of the epithelium of the tail, showing 
intracellular (z) and intercellular (z') nerve terminations. Gold chloride and 
formic acid. 
Fic. 4.—Epithelial cells of the tail, isolated after treatment with gold 
chloride and formic acid. a. A superficial cell. 4, A cell of an intermediate 
layer. x. Intracellular nerve terminations. e. Figure of berth, 
Fic. 5.—Basal cells of the epithelium, surrounded by the finely precipitated 
intercellular fluid. . Intracellular. 2’. Intercellular nerve endings, Ata 
and 4 only the upper portions of two of the cells are seen. In the preparation 
from which this was drawn, the cellular protoplasm and the figures of Eberth 
are uncoloured and undistinguishable. Gold chloride, formic acid. 
Fic. 6.—Three cells of the superficial layer of the epithelium from near the 
mouth, with an intra-epithelial nerve-fibril (a) giving off branches, one of which 
penetrates a figure of Eberth (e), two others end free between the cells ; while 
