PROCELLARIID.E—PUFFININ^: SHEARWATERS, ETC. 



1037 



about 12.50; wing 9.25; tail 3.15; bill 1.50 along gape; tarsus 1.80; middle and outer toe and 

 claw 1.90; inner l.GO. Clarion Island of Revillagigedo Group, Mexico, to Cape San Lucas, 

 Lower California. New to the Key. C. H. Townsexd, Pr. U. S. Nat. Mus. xiii, Sept. 9, 1890, 

 p. 133; Salvin, Cat. B. Brit. Mus. xxv, 1896, p. 380; Anthony, Auk, 1898, p. 38, p. 313, 

 p. 317; A. 0. U. Coram. Suppl. List, Auk, Jan. 1899, p. 101, No. 93.1. 

 P. assim'ilis. (Lat. assimilis, assimilated ; ad, to, and similis, similar, like.) Similar 

 Shearwater. Resembling the last ; upper parts rather less blackish, with more of a slaty-blue 

 shade ; line of demarcation between dark upper and white lower parts better defined along sides 

 of neck; especially, primaries white underneath on most of the inner webs; under tail-coverts 

 and lining of wings all white ; white rising on sides of head to include most of auriculars and 

 lores; obscurely whitish edgings of greater wing-coverts. Bill black; feet blackish, with yel- 

 low webs. Small: Length 10.50-11.00; wing 6.50-7.00; tail 2.75; bill 1.00 along culmen; 

 1.40 along gape, 0.70 from nostril to tip, scarcely 0.20 high or wide at nostril, hardly 0.50 in 

 length of the hook at end; tarsus 1.35; middle toe and claw 1.65. A very small species of 

 Australian and New Zealand seas, N. in the Atlantic to Madeira, accidental in North America 

 on Sable Island, Nova Scotia, Sept. 1, 1896 (Pr. Biol. Soc. Washn. xi, April 21, 1897, p. 69). 

 P. assimilis Gould, P. S. Z. 1837, p. 156; B. Aust. vii, 1848, pi. 59. P. nugax and P. hail- 

 loni Bp. 1856. See Coues, Pr. Phila. Acad. 1864, p. 141 and p. 144. P. assimilis, A. 0. U. 

 Comm. Suppl. List, Auk, Jan. 1899, p. 100, No. [92.1.]. 



(** Unieolor species, dark below as above.) 



P. fuligino'sus. (Lat. fuliginosus, sooty. Fig. 707.) Atlantic Sooty Shearwater. 

 Strickland's Shearwater. Black Hag or Hagdon. Adult $ 9 : Nearly uniform dark 

 sooty-brown, blackening on quills and tail-feathers, more sooty-gray below, paler still on throat : 

 lining of wings mixed sooty and whitish. Bill drying an undetinable dark color, in life dusky 

 bluish-horn color, the tube, 

 ridge, and hook blackish ; feet 

 drying dark outside, pale in- 

 side; in life inside of tarsus and 

 upper side of feet livid flesh- 

 color, outside of outer toe and 

 under side of feet blackish ; 

 eye blackish. Length 16.00- 

 18.00; extent about 40.00; 

 wing 11. .50-1 2.00; tail 4.00; 

 tarsus 2.25; middle toe and 

 claw 2.50; chord of culmen 



Fig. 707. — Sooty Shearwater, nat. size. (Ad. nat. del. E. C.) 



1.75-2.00; gape 2.33; feathers on side of lower mandible to tip 1.67 ; depth of bill in front of 

 nasal tube 0.40. A wide-ranging Atlantic species; common off North American coast, espe- 

 cially northerly, in summer, in flocks with P. gravis. It is perfectly distinct from any of the 

 two-colored species, of .several of which it has at times been considered to be the 9 I'l" ^ special 

 state of plumage. Breeds in colonies, often of great extent, laying in holes burrowed several feet 

 deep in the ground; egg single, white, 2. .55 X 1-75. P. stricklundi Ridgw. 1884; A. 0. U. 

 No. 94, 1886-95. But the species, supposing it to be distinct from the Pacific P. griseus, is 

 correctly named as above in all editions of the Key, for Puffinus fitliginosHS Strickl. ISlii, is 

 not voided on account of any prior Procellaria fuUginiisn. applied to several different species of 

 other genera than PulJinns : see CouE.s, Auk, July, 1897, p. 315 ; whence the A. O. V. reverted 

 to the oriuinal nomenclature of the Key: see Supjd. List, Auk, Jan. lH!t9, p. 101, No. 94. 

 I*, gri'seus. (Lat. griseits, gray.) Pacific Sooty Shearwater. Dark-iiodied Shear- 

 water. Similar to the last, from wliicli perhaps not specifically diininct. Under wing- 

 coverts white, only interrujitrd by somr (Insljy niarbling ; tlimat sometimes whitish. Bill 



