Vot. II, Pr. IT] LOOMIS—A REVIEW OF THE TUBINARES 105 
The Mottled Petrel is a wide-ranging species, breeding in 
the Southern Hemisphere and visiting the Northern Hemi- 
sphere after the period of reproduction. 
There is considerable variation in the extent of the white 
and in the aspect of the gray in the seven Expedition specimens. 
In No. 1135 the white extends from the bill almost to the ab- 
domen, while in No. 1136 it ends on the anterior part of the 
breast and is much obscured by gray, the chin and throat alone 
being immaculate. In the whole series there is an intrusion of 
gray on the lower tail-coverts, very slight, however, in No. 
1134. The extremes in the gray coloration are represented in 
No. 1139 and No. 1134; the former is slate-gray above and 
dark mouse gray below and the latter gray above and mouse 
gray below. The ashy white tips of the feathers of the upper 
parts have suffered more or less from wear in all the specimens 
of the series. No. 1138 has thirteen rectrices. 
A male from the collection of Dr. Leonard C. Sanford, taken 
near Kiska Island, Alaska, June 17, 1911, by Mr. R. H. Beck, 
is undergoing a complete moult, which is apparently about over 
on the body. The worn outer primaries still remain, but the 
inner ones are being replaced. Six of the Expedition spect- 
mens show some feather replacement; in several it involves the 
tail. According to Mr. Gifford, the sexual organs were small in 
the seven Expedition birds. 
Mr. Gifford reports the colors of the unfeathered parts as 
follows: “Bill and orbital ring black; iris dark brown; tarsus 
and base of toes and webs very light bluish; remaining portions 
of webs and toes black. One specimen had tarsi, toes, and webs 
all black.” 
Procellaria gularis Peale is apparently a synonym of Proéel- 
laria inexpectata J. R. Forster, for Forster’s description covers 
well the essential characters of Peale’s type (No. 15706 U. S. 
Nat. Mus.) and antedates Peale’s description.* Pterodroma 
inexpectata, therefore, appears to be the proper name of this 
species. Although aware of the priority of imexpectata, Mr. 
Salvin and Dr. Godman preferred to use in their monographs 
the later specific name, gularis. 
ogi CE Forster, Deser. Anim. 1844, pp. 204, 205; Peale, U. S. Expl. Exp. 1848, p. 
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