CAUDAL AUTOTOMY AND REGENERATION IN THE GECKO 93 
and the animal shed it ‘ not very easily’. The stump bled to 
some extent, but not profusely. 
Regeneration from obliquely-cut Ends of 
the Original Tail. When one or two segments of the 
original tail are cut through obliquely from left to right (Text- 
fig. 5, C, C’) or from right to left (Text-fig. 5, D, D’), the axis 
of the regenerated tail is usually bent out of the straight line 
in order to place itself at right angles to the plane of the cut 
(six experiments). 
When one segment of the original tail is cut obliquely 
ventro-dorsally and postero-anteriorly (Text-fig. 5, EK, E’, E”) 
the axis of the regenerated tail is usually bent downwards in 
order to place itself at right angles to the plane of the cut 
(three experiments). 
When one or two segments of the original tail are cut obliquely 
dorso-ventrally and antero-posteriorly (Text-fig. 5, F, F’) the 
axis of the regenerated tail is usually bent upwards, the more 
so if the number of cut segments be two (four experiments). 
In four experiments in which one segment of the original 
tail was cut to a point by left and right lateral cuts (‘ext-fig. 
5, G, G’) the axis of the regenerated tail remained in the 
straight line. 
In three experiments in which similar cuts were made 
dorsally and ventrally (Text-fig. 5, H, H’) the same result was 
obtained. 
Regeneration from the Regenerated Tail. A 
transverse cut through a regenerated tail merely leads to 
a second regenerated tail being produced (two experiments). 
When the regenerated tail is cut obliquely (Text-fig. 5, 
J, J’, K, K’, L, L’) the second regenerated tail behaves in the 
manner already described for regeneration from the original 
tail (at least six experiments). 
Accessory Tails. Inall the 1918 experiments chronicled 
above (which are only a selection of the experiments I 
actually performed), and in a number of similar experiments 
which I conducted in 1914, I only obtained four examples in 
which accessory tails were produced. ‘Text-fig. 5, M, M’ shows 
