124 SPOLIA ZEYLANICA. 
For along the river valleys, in the gemming fields, in the 
beds of streams, and in a hundred other places relics of a 
long-forgotten past lie buried to him who will investigate is 
the joy of fresh discovery assured. 
Much may be done if only people will keep their eyes open 
and record simple facts. Every fact, however isolated, is of 
value, though its true significance may not be gauged at once. 
There are men among us who have done splendid service 
and will yet do more in the cause of science ; but the humblest 
may add his quota to the store of knowledge by the simple 
means of observation. 
If there is any one in need of a hobby, but who feels 
himself unqualified to tackle the more intricate problems of 
biology, let him take up the work where I have dropped it ; 
for there he will find himself on the edge of a vast and un- 
explored territory, wherein he may accomplish far more than 
it has been my humble lot to do for the Natural History of 
the Island. 
I have to express my indebtedness to Mr. G. M. Henry for 
kindly undertaking to draw the figures, and to Mr. C. Hartley, 
not only for the helpful criticism and advice, from which the 
author has on many occasions profited, but also, and chiefly 
perhaps, for performing the onerous task of seeing this paper 
through the press. 
APPENDIX A, 
The Human Period is subdivided as follows :— 
[2Bstore Age 
Early Iron Age | Modern races | 
voce 4 Bronze Age r of man l 
| Modern species 
| Neolithic Age, i) f of man 
(Magdalenian | 
Solutrean J 
RES eres Aurignacian 
( Pal eolithic 4 Mousterian | 
eters eO eee = ; ( Gh Bee Extinet species 
| Pre-Paleolithic of man 
: Kolithie 
Pliocene 
Sub-Crag 
