16 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
land, and the entire Galapagos Archipelago. Characteristic 
species appear to be the following: 
Diomedea irrorata Pterodroma solandri 
Bulweria macgillivrayi Pterodroma inexpectata 
Pterodroma axillaris Procellaria parkinsoni 
Pterodroma leucoptera Puffinus creatopus 
Pterodroma brevipes Puffinus bulleri 
Pterodroma nigripennis Oceanodroma hornbyi 
Pterodroma cooki Oceanites gracilis 
Pterodroma externa Pealea lineata 
Pterodroma cervicalis Fregetta albigularis 
Pterodroma rostrata Fregetta moestissima 
Pterodroma aterrima Pelecanoides garnoti 
The South Atlantic Area comprises the South Atlantic 
Ocean north of the isotherm of 15° C. for January. Its 
characteristic species remain to be determined. 
The North Pacific Area includes the Indian and Pacific 
oceans north of the Equator (exclusive of Galapagos waters), 
and extends through Bering Strait into the Arctic Ocean. The 
characteristic species are: 
Diomedea nigripes Halocyptena microsoma 
Diomedea albatrus Oceanodroma macrodactyla 
Diomedea immutabilis Oceanodroma homochroa 
Pterodroma hypoleuca Oceanodroma tristrami 
Puffinus opisthomelas Oceanodroma melania 
Puffinus auricularis Oceanodroma furcata 
?Puffinus leucomelas 
The North Atlantic Area covers the North Atlantic Ocean 
and portions of the Arctic Ocean. The following species are 
characteristic of this area: 
Pterodroma hasitata Puffinus puffinus 
Pterodroma caribbea Thalassidroma pelagica 
Puffinus kuhli 
Fulmarus glacialis, Bulweria bulweri, and Oceanodroma 
leucorhoa are common to the North Pacific and North 
Atlantic areas. 
Subareas 
The subjoined synopsis indicates the subareas thus far rec- 
ognized by me. They are, however, largely tentative, for our 
knowledge of the breeding stations of many species is still 
very imperfect. 
agin aie nat 
