SPECTACLED PETREL. 
P. a. mixta, subsp. n. ; Type no. 3748 in my collection ; Cape seas. Probably 
the breeding bird of Kerguelen Islands and Crozets. 
With a larger amount of white on chin and sides of face, but no 
white on head as in P. a. conspicillata, from which form it is easily 
separated by its much darker coloration and stouter bill, as well as 
lack of head markings. The bill is, according to Giglioli, “ Pale 
yellow without blackish tips to mandible,” while Nicoll gives it as 
“ Greenish-yellow, and with black streaks on both mandibles,” 
and Carter says “Yellow, culmen and tip black.” This specimen 
was collected by Mr. Tom Carter on the 26th April, 1909. 
Regarding the Kerguelen bird. Hall writes {Ibis, 1900, p. 21) : 
“ One of our Kerguelen birds had yellowish-blue horn-colour 
predominating over most of the bill, with a ridge of black along 
the lower mandible, and one- third of the upper mandible from the 
nostril was also black. The sitting birds in three cases had white 
chins only, while a fourth had white blotches on the cheeks. 
Throughout our sojourn on or near the island I did not see a 
typical Spectacled Petrel. I may mention that, like Dr. Kidder, 
I saw birds flying about without any of the white on the chin 
which is characteristic of the species ” — and noted one looked 
exactly like the New Zealand M. parJcinsoni. I have just noted 
that Buller records seeing this latter species near these islands. 
It may be that such a bird without a chin-spot breeds somewhere 
in this locality of which no specimens have yet been procured. 
The length of this bird’s wing is about 374 mm ; it is remarkable 
how constant these birds are, four birds measured at random 
giving .374, 374, 374, 375 mm. 
Ill 
