46 H. W. MARETT TIMS., 
From a comparison of the epidermis in the two forms, 
the glands present in the cod correspond to the mucin- 
secreting, the larger being unrepresented, slime not being 
present in the cod. When viewing the surface the rounded 
ends of the glands are visible, and give to the tissue the 
appearance of ordinary vegetable parenchyma. Lying upon 
the surface of the cells are numerous chromatophores, dis- 
tributed with a considerable degree of regularity. Comparison 
with the gar-pike shows that the presence of the larger 
glands in the latter cause a more reticulated appearance, 
the wider meshes representing their cavities. 
Beneath this layer is a thin, but well-defined basement 
membrane, corresponding, I take it, to Huxley’s proto- 
morphic layer, the readily detached epidermis being con- 
sequently ecderonic, the tissue lying subjacent to the base- 
ment membrane being enderonic. 
The enderon is clearly divisible, even from an early stage, 
into two layers, an outer composed of elongated, nucleated, 
closely-set cells, the boundaries of which are distinguishable 
with difficulty ; so numerous are they, that this might almost 
be designated as the “nuclear layer.” It stains deeply with 
borax carmine, offering a marked contrast to the next or 
deeper layer of enderon, in which the tissue is more fibrous, 
the fibres running longitudinally. The nuclei here are 
more sparsely scattered, larger, and more elongated than 
in the previous position. Beneath this and separating it from 
the muscle is yet another layer of pigment cells, which vary 
considerably in size and are very unevenly distributed. The 
conditions are represented in Fig. 38. 
Comparison with the dermis of Lepidosteus (16) shows 
the same general disposition of parts, though differing in 
details. For example, I have not been able to distinguish 
the more complicated interlacement of fibres noted by 
Nickerson. 
In the cod the scales arise in the more superficial 
nucleated layer of the dermis, their first indication being 
local aggregations of cells, as evidenced by their nuclei. A 
