Report of a I\ fission to Guam. 23 



7. Puffinus tenebrosus Pelz. Pel^eln's Shearwater. 



Upper color sooty black, sides of ueck and breast slaty with 

 whitish margins to the feathers. Length 12, wing 7.20-7.80, tail 

 2.95-3.25, culmen 1-1.05, tarsus i. 40-1 .45, mid-toe and claw 1.50- 

 1.60. Hab. Coast of Australia. 



8. Puffinus obscurus Gm. Dusky Petrel. 



Probabl}' same as above. Length 12, wing 7.8, tail 3.2, bill 

 1.5, tarsus 1.5, mid-toe and claw 1.6 (Samoan Islands). Hab. 

 Tropical and sub-tropical seas. 



Order STEGANOPODHS.— Totipalmated Swimmers. 



a". Nostrils distinct, bill sharp-pointed without hook, chin 

 feathered, tail short, graduated, in the adults the two middle 

 feathers are greatly elongated. Famil}- Phaithontidcr. 



a,-. Nostrils not distinct, head partly naked, bill stout but not 

 hooked, tail about half as long as wing. Famil}' Sulidir. 



a^. Nostrils distinct, bill hooked at tip, lores feathered, upper 

 plumage black, tail forked, wing long. Family Fregatida:. 



Family PHABTHONTID^.— Tropic Birds. 

 Genus PHABTHON Linn^us. 



9. Phaethon candidus Temm. Boatswain Bird. Tropic 



Bird. 



General color pure white ; a black band bordering both sides 

 of the head, passes through the eye, and terminates in a crescent- 

 shaped mark at gap ; a black band on the wings. Length 30, cul- 

 men 1.8-2, wing 10-10.6, tail 1 7.3-21, tarsus .8-. 9. The young 

 are barred with black. Hab. Inter-tropical seas, except coast of 

 North America. "Resident on Agrigan, of the Marianas." 



Family SUI/ID^.— Gannets. 

 Genus SITI/A Brisson. 



a". Feet greenish or yellowish ; head, breast, neck and upper 

 ]')arts brown. Sida sula. 



a-. Feet always reddish, head and neck white, tinged with 

 buff : general color white. Sula piscator. 



