516 A. B. DAWSON 
at right angles to each other as in the inner compact region. 
The layers here are, to be sure, much more delicate, but the 
arrangement is the same, and at frequent intervals bundles of 
connective tissue turn down and enter the middle layer. 
A peculiar feature of the outer compact stratum is the manner 
of its union with the epidermis. On the bases of the cylindrical 
cells of the germinative layer, there are fine tooth-like projections, 
which extend into the dermis and blend with the connective- 
tissue fibrils. In other places large triangular projections of the 
epithelial cells are to be noted extending down into the outer 
compact layer, especially in places where perpendicular bundles 
turn down into the middle layer. In some cases these projections 
appeared to be united with the processes of connective-tissue 
cells, but it was difficult to demonstrate actual continuity. 
In the vicinity of the edges of the tail the intermediate region 
disappears (fig. 17). The two compact layers come to lie quite 
close together with only pigment cells and blood-vessels in 
the position usually occupied by the spongy stratum. Perpen- 
dicular bundles which turn down from the outer layer often 
extend completely across the inner compact region and are lost 
to view in the loose tissue below. 
As already stated, the glands on the body are usually imbedded 
in the loose intermediate zone, but occasionally a few are seen 
below the inner compact layer, lying in the subcutaneous tissue 
and next to the body muscles. In the edges of the tail no skeletal 
muscles are present, the entire space between the integument of 
the opposite sides being taken up by the subcutaneous connective 
tissue. In this region practically all of the glands are imbedded 
in the loose tissue between the inner compact layers of either 
side. In a few instances small glands were seen in the position 
which would have been occupied by the middle stratum if 
present. 
B. Pigment 
In the more heavily pigmented regions of the body the chroma- 
tophores are arranged to form continuous sheets beneath both 
the inner and outer compact layers. In addition they are 
