PUFFINUS, 435 
Two specimens from the same locality have been lent me by Mr. Rothsehild, 
and these are very like the members of the P. obscurus-group, but larger than any 
of them, 
Mr. Anthony noticed P. auricularis when crossing from Cape San Lucas to San 
Benedicto, and also on the island itself, and afterwards about Socorro, but found no 
evidence of its nesting in the last-named place 4. 
On San Benedicto he procured many quite young birds in the last week of May ®, 
and also met with it breeding on Clarion Island, full-grown young being taken in the 
same month. The burrows were confined to the higher parts of San Benedicto, about 
000 feet above the sea, amongst tangled grass, and were well scattered, seldom more 
than a dozen being seen together. They were not so long nor so deep as those of 
P. opisthomelas on Natividad, averaging about five feet in length. The colonies on 
Clarion Island were more extensive, each suitable patch of grass being well populated. 
8. Puffinus auduboni. 
Puffinus auduboni, Finsch, P. Z. S. 1872, p.111*; Baird, Brewer, & Ridgway, Water-Birds N. Amer. 
ii. p. 886°; A. O. U. Check-l. N. Amer. Birds, 2nd ed. p. 82°. 
Puffinus obscurus auduboni, Rothsch. & Hartert, Nov. Zool. vi. p. 195‘. 
Puffinus obscurus (nec Gm.), Coues, Pr. Acad. Philad. 1864, pp. 137°, 144°; Salvin, Cat. Birds 
Brit. Mus. xxv. p. 382 (part.)”. 
Fuliginoso-nigricans, vix cinereo adumbratus: subtus pure albus, hypochondriis imis brunneo irroratis, latius 
fuliginoso-nigro striatis, plumis nonnullis intus nigricantibus; subcaudalibus albis, longioribus brunneis ; 
loris et facie laterali cum regione parotica et colli lateribus distincte cinereo lavatis ; subalaribus albis, 
in thousands on Natividad, a small island lying about thirty-five miles south of the San Benito group. The 
burrows of these birds extended for about ten feet, seldom, if ever, straight, the nest being at the end, and 
rarely more than eighteen inches below the surface. 
Eggs from Natividad have been presented by Mr. Anthony to the British Museum *. 
- The following allied form has been recorded as occurring from “California to Chile,” but there is no direct 
evidence of its having been found on the coast of Central America or on the adjacent islands. 
Puffinus creatopus. 
Puffinus creatopus, Coues, Proc, Acad. Nat. Sci. Philad. 1864, pp. 1314, 144 *; Baird, Brewer, & Ridgway, Water- 
Birds N. Amer, ii. p. 883%; A. O, U. Check-l. N. Amer. Birds, 2nd ed. p. 32%; Salvin, Cat. Birds 
Brit. Mus. xxv. p. 376°. 
P. opisthomelant similis, sed multo major, remigibus basin versus conspicue albis, gutture imo et preepectore 
medio pure albis, plumis minime cinereo fimbriatis, axillaribus quoque fere cinereis, albo marmoratis vel 
fasciatis, cauda magis cuneata distinguendus: rostro flavicante, apice corneo ; pedibus flavis, extus 
saturatioribus. Long. tota circa 18:0, ale 13-0, caude 4:3, culm. 1°75, tarsi 2°1, (Descer. maris adulti 
ex Monterey. Mus, Brit.) 
Hab. Western Coast or AMERICA FROM CaLiForNtA 10 Curtu®; Juan Fernanvez I.5, 
P. creatopus is similar to P. opisthomelas, but is very much larger, the wing exceeding twelve inches in 
length, and also differs in the other characters given above. 
55* 
