A Review of the Land Mollusca of Western Adsthalia. 
17 
ing to the coast from there to Cape Leenwin and thence still coastwise to 70' 
miles cast of Israelite Bay. Though apparently a coa.stal groui), it has not 
been collected yet on the islands of the Recherche Grou]), although one 
species comes from Doubtful Island, a coastal islet. On the other hand, the- 
tnie Bothriembrynn is abundant on Ihe i.slands of the Recherche Group and 
the mainland ad.jacein, and then from Ring Ocorge’s Sound seems to make 
an iidand mandi across to Perth. It has not yet been recorded from the 
Stirling' Ranges where a peculiar Telemhrycn lives alongside Diulembryon. 
The range of this last-named group is peculiar, species being known from 
the Darling Range.s inland from Perth, the Stirling Ranges and the hazel 
scrubs a little west of King George’s Sound. Still more curioms is the dis- 
tribution of the giant Ponembryon, which appears somewhere about King 
George’s Sound and occurs eastward to the Fraser Range. This leaves 
EartoyembryoH and SaUigembryon, which are localised, and a.s above noted 
these may be only specialised offshoots from Bothriembryon and T elembryon 
respectively. A glance at a rainfall chart will show that these larger groups 
are not governed by present-day rainfall, though investigation suggests that 
species vary in accordance with the annual rainfall. Furthermore, it seems 
that certain trees live under certain geological conditions, and that some of 
these snails are associated with de'finite botanical formations. This cannot 
be definitely asserted as there are too little data, but it would be a good line 
to follow. 
The species are easily di,stingni,shable, but there is a lot of individual 
variation. No mechanical method of diagnosis can be used, though examina- 
tion of series enables differentiation with ease. Conseipieiitly the norm of 
the series is here described and the coiinectant variation recorded, but speci- 
mens must be available for comparison and recognition. I’igures without 
confirmative shells can prove very misleading, whereas topotypes are of very 
definite value and few mistakes will be made in their use. 
Genus BOTHRIEMBRYON Pilsbry 1H94. 
1891 — BolJirieriibryon Pilsbry, Nautilus, Vol. Till,, p. 36, July. Orthotype 
Buhmns mclo (.luoy and Gaimard. 
1861 — Lipariis Jlartcais, Die Heliceen (Albers), 2ncl eel., p. 229. Orthotype 
Bulimiis inl/atiiii Lamarck. 
Not Liparus Albers, Die Heliceen, 1st cd., p. 172, 1850. 
1933 — Ilartoyevibi yon Iredale, Rec. Austr. Mus., Yol. XIX, p. 41, Aug. 2. 
Orthotype Biilimus ou-^lowi Cox. 
1933 — Larapinlembryon Iveelale, Rec. Austr. Mus., Vol. XIX, p. 41, Aug. 2. 
Orthotype Lipanis spencori Tate. 
1933 — Satagombryon Iredale, Rec. Austr. Mus., Vol. XTX., p. 41, Aug. 2. 
Orthotype Buliminus gratwicM Cox. 
The characters of the genus, as here used, are those already fully 
detailed in connection with the family just preceding. 
Bothriembryon melo Quoy and Gaimard 1832. 
Plato IL, fig. 1. 
1832 — Helix melo Quoy and Gaimard, Voy Astrol. ZooL, Vol. II., p. 109, pi. 0, 
figs. 4-7. Summit of Bald Head, King George’s Sound, South-West 
Australia. 
