THE COLLECTIONS FROM TAHITI AND THEIR INVESTIGATION. 31 
which are quite useless for the purposes of the present study. Certain other 
Tahitian references exist in the literature, but the forms so recorded are either 
varieties or are erroneously attributed to Tahiti. 
The distribution of the Tahitian species during the last quarter of the nine- 
teenth century is known from Garrett’s detailed monograph. In addition he drew 
a map showing their general localization, which map was published with a paper 
by Hartman; this chart, in its original and in rectified form, is given in text-figures 
2 and 3, and is a graphic record to which reference will be made at many points in 
the following analysis. 
“ 
pe 
atfints 
rechescens 
Rae Cassa 
hyaline 
Sinistrorse 
Producte 
yar 
hyalina 
Stristrorsa y iy NE I: 
7TUbescens 
Ztlenuata 
hyatina 
aKMinis 
Tgyxt-Fic. 3.—Corrected form of Garrett’s chart (text-fig 2) showing the distribution of Tahitian Partulz in his time. 
Original lettering. 
THE GEOGRAPHY AND TOPOGRAPHY OF TAHITI AND OF THE AREAS OF HABITATION. 
We must now consider in some detail the general and special topographic 
features of Tahiti in order to define the degrees of proximity or isolation of areas 
whose species and varieties are subsequently to be described and compared. ‘The 
valleys from which specimens were taken are listed in table 9, which also gives 
their location in the geographical or administrative districts, and in the major 
sections of the whole island. In order to bring out the essential topographical 
features, a model about 4 feet in diameter has been constructed by members of the 
