Ne al Sr 
107 
“4 
prion of Lacepede, the genus pachytila of IMlligar, 
the type being the procellaria vittata and cerulea of 
Gmelin. — 
Our bird has a triple row of palatal teeth, which 
I do not find to be a peculiasty set down of petrels 
generally, though I suspect it isso. The prions, 
however, likethe diomedeas are birdsof the Southern 
Hemisphere. Mr Gould, the distinguished ornitho- 
logist thus notices them. From the westerly winds, 
which prevail in the Southern Hemisphere, between 
the latitudes 35° and 55°, Iam induced to believe 
that a perpetual migration is carried on by several 
members of the oceanic family, continually passing 
from west to east, and circumnavigating this portion 
_of the globe. Thisremark more particularly refers 
to the albatrosses, prions, and otner large kind of 
petrels; the same individuals of several of these 
species having been observed to follow our ship for 
some thousand of miles. Until I had ascertained 
that they were nocturnal, it was a matter of surprise 
to me hew the birds which were seen around the | 
vessel at night fall were to be observed crossing -our 
“wake at day-break on the following morning, the 
ship having frequently ran a distance of nearly one 
hundred miles during the night.” (Zool. proc. 1889.) 
