[ ] 
feems to prove to demonftration of what fpecies the 
four fvvallows caught in the fhip really were. 
He fays that they rooft on the land either by 
themfelves, or at mod only in pairs, and that they 
frequent the coaft much more than the inland 
parts *. 
Thefe fwallows therefore, if they came from 
Europe, muft have immediately changed at once their 
known habits : and is it not confequently mod: clear 
that they were of that fpecies which Briffon defcribes 
under the name of Iiirondelle de rivage du Senegal ? 
But though it fhould be admitted, notwithftanding 
what I have infilled upon, from Monf. Adanfon’s 
own account, that thefe were really fwallows of the 
fame kind with thofe of Europe ; yet I muft ftill 
contend that they could not poflibly have been on 
their return from Europe to Africa, becaufe the high 
road for a bird from the moft Weftern point of 
Europe to Senegal, is along the N. Weft coaft of 
Africa, which projects greatly to the Weftward of 
any part of Europe. 
What then could be the inducement to thefe four 
fwallows to fly 50 leagues to the Weftward of the 
coaft of Senegal, fo much out of the proper 
direction ? 
It feems to me therefore, very clear, that thefe 
fwallows (whether of the European kind or not) 
were flitting from the cape de Verde iflands to the 
* Voyage au Senegal, p, 67, I wifh Monf. Adanfon had 
alfo informed us whether thefe fwallows had the fame notes with 
thofe of Europe, which is a very material circumftance in the 
natural hiftory of birds, though little attended to by moll orni- 
thologies. 
Vol. LXII, O o coaft 
