106 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
Besides the type of “Procellaria gularis,’ I have examined 
the type of Gstrelata fisheri Ridgway (No. 89431 U. S. Nat. 
Mus.) and that of 4strelata scalaris Brewster (No. 5224 Coll. 
W. Brewster). The type of “CGstrelata fisheri’ is a worn, 
faded, and rather weak-billed example of Pierodroma inex- 
pectata. The white-headed aspect is caused chiefly by wear 
and accidental loss of feathers, exposing the white bases. The 
feathers of the upper parts of the body are much worn, ac- 
counting for the absence of the whitish margins characteristic 
of the fresh plumage of Pterodroma inexpectata. The weak 
appearance of the bill is largely due to mutilation, the basal 
portion of the unguis having been torn off and the nasal tubes 
flattened. ‘The color above is darker than in No. 1134 and 
lighter than in No. 1139 of the Expedition collection. The 
markings of the pileum and nape and the extension of the white 
of the rectrices, greater wing-coverts, and secondaries break 
down through an intermediate New Zealand specimen (No. 
24345 Carnegie Mus.). The type of “strelata scalaris’” is 
merely a bird in fresher plumage than the other types. The 
supposed differences in the nasal tubes do not exceed the nor- 
mal variation occurring in Pterodroma inexpectata. 
