424 NATATORES. URIA. GUILLEMOT. 
garb of Monracv’s lesser species, that were taken upon our 
own coast. Another reason advanced by him for consider- 
ing them distinct, is the abundance in which they are found 
in the white-throated state upon the coast of Scotland, during 
the winter, compared with their rarity upon the English 
coast ; observing, at the same time, that the numerous colo- 
nies which make the English shores their summer or polar 
retreat, depart, after obeying the dictates of nature, to more 
southern climates. Now, this in fact is only consistent with 
the laws of migration, the birds that winter in Scotland 
being the summer inhabitants of much higher latitudes, to 
which they again retire upon the approach of spring, when 
they are succeeded by those which had migrated farther to 
the southward in the autumn of the preceding year. It may, 
indeed, appear striking, that they should not extend their 
migration in equal numbers along the English coast, but suf- 
ficient inducement for limiting their flight, will, I think, be 
found in a comparative view of the two countries. Scotland is 
deeply indented by its friths, salt-water lochs and bays, all 
of which abound with the herring species, the principal food 
of the Guillemot, and to be met with even in the depth of 
winter ; and these are the situations it inhabits. The Eng- 
lish coast, on the contrary, possesses no such attractions 
during winter for this piscivorous bird, as the herrings and 
sprats, which through the spring and summer approached 
the coast, then retire to the deeper parts of the ocean, where, 
in all probability, they are almost beyond the reach of these 
and other diving birds. Our English summer visitants re- 
tire to the Mediterranean, to the coasts of Italy, Sicily, &c. 
where they find an ample supply of even richer species of 
their favourite fish, as the Anchovy and Sardine. It may 
also be observed, that among the myriads that breed in the 
northern isles of Scotland, and still higher latitudes, none 
have been found during the period of incubation, or imme- 
diately preceding it, in the plumage assigned to the Lesser 
Guillemot ; but all are distinguished by the pitch-coloured 
head and neck, the appropriate livery of the Foolish Guil- 
