957 
body, and spreads from there along the cellstreams over the flanks 
of the body. However in the case of Megalobatrachus there is no 
obvious pattern at all, which is probably connected with the fact that 
Fig. 2. 
the lateral sense-organs are distributed over the skin in a strikingly 
irregular way. While in younger larvae the shades of colour in the 
pigmentation of the skin, owing to the cellstreams are obvious, they 
give place to a very regularly spread darker colour of skin in 
older larvae. 
Once having found in Megalobatrachus, that the skin-growth, and 
in connection with this, the first appearance of the autochtone pig- 
ment, not only occurs in a similar way, as Hacker found in Axolotl 
larvae, but that the “chess-board type’ was evident in a specially 
young stage of development, which Hacker supposed, but had not 
seen, | tried to enlarge my investigation on the skin-growth in 
examining the embryos of different reptiles. The cytological exami- 
