180 
THE COMITY OF SPIDERS 
Some islands are undoubtedly oceanic in origin and have never 
been joined to any mainland; others have had their fauna obliterated 
by ice caps (Spitsbergen) or by volcanic eruptions (Krakatoa) since 
they became islands. All have a flourishing spider fauna now, which 
cannot be attributed either to land bridges or to man's agency. 
Berland expresses the regret that if my assessment of the 
importance of aerial dispersal were justified, all value attaching to 
spiders as evidence of changed geographical boundaries would 
disappear. With this view I do not entirely agree, but I do stress the 
importance of caution. I will return to this subject after discussing the 
two principal means by which spiders are dispersed. 
B. TRANSPORTATION BY MAN. 
When moving house I have noticed 
Tegenaria domestica 
Linn. 
amongst my incoming furniture. In boxes of flowers brought back to 
London from the country I have found 
Araneae
,
 Dictynae
,
 Clubionae
,
Philodromi
,
 Theridion
,
and small Linyphiids. In fishing boats and 
motor lorries 
Zygiella litterata 
webs. On board ship bound for Brazil 
an 
Oecobius annulipes 
and a 
Lepthyphantes
.
On the way to the East a 
Menemerus bivittatus
.
Apart from these personal observations I owe additional evidence to 
friends. O. W. Richards has sent me 
Teutana grossa 
C.L.K. and 
Pholcus phalangioides 
Fuess. from the London docks. 
Ports ranging from Dundee to Dover have yielded me West Indian 
Salticids, Brazilian Ctenids and Mygalomorphs, a Selenopid and 
Pholcid of unknown tropical origin, a Canary Island Zoropsid 
(
Zoropsis maculosa 
Camb.) and Theridiid (
Lithyphantes nobilis 
Thor.)*, and numerous specimens of the widespread tropical 
Sparassid, 
Heteropoda venatoria 
Linn. 
This last spider comes into this country in hundreds 
* A. F. Millidge has just sent me another Canary Island inhabitant caught in the I. of 
Wight outside a fruit shop   the Sparassid, 
Olios argelasius 
Walck. 





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