



330 PEOCELLAEIID^, PETRELS. GEN. 308, 309-10. 



308. Genus FREGETTA Bonaparte. 



Z)"^/ '' White-bellied Petrel. Blackish-gray of variable intensity, blackening on 

 the quills and tail, the whole under parts from the breast, the up^jer tail 

 coverts, most of the under wing coverts, and bases of all the tail feathers 

 except the middle pair, Avhite ; bill and feet black. Length about 8 ; wing 

 6-6J; tail 3, about even, with very broad, square-tipped feathers; bill i; 

 tarsus 1 J ; longest toe (outer) and claw 1 or less ; tibife bare 1 or more. 

 Florida, accidental, one instance (Lawr. Ann. Lye. N. Y. v, 117). Procel- 

 laria grallaria Vieill. Frocellaria fregetta Kuhl, and many authors. 

 Thalassidroma leucogastra Gould. Fregetta Icmrencii Bonap. ; Lawk., in 

 Bd., 832 (unquestionably this species) grallaria. 



.A 



309-10. Genus PUFFINITS Brisson. 



* Nasal tubes vertically truncate, with thin septum. (^Priofinus.) 

 > Black-tailed /Shearwater. Upper parts cinereous, nearly uniform, but 

 some of the feathers with paler edges; under parts white, without line of 

 demarcation from the color of the ujDper parts ; fail, crissum and vent blackish; 

 lining of wings, axillars, and some feathers on the sides of the body, 

 brownish-cinereous ; quills blackish-cinereous on outer webs and tips, paler 

 internally and basally, with brown shafts ; bill yellow, the nasal case, culmen 

 as far as the hook, cutting edge and groove of lower mandible, black ; feet 

 (dried) dingy greenish with yellow webs. Large; 19; wing 13 ; tail 5-5 1, 

 wedge-shaped, 12-feathered, the outer feathers an inch or more shorter than 

 the middle; bill If, f high at base, the nasal tubes nearly i ; tarsus 2f ; 

 middle toe and claw 2-J. Accidental off the coast of California. A peculiar 

 species, very different from any of the following, approaching the fulmars. 

 Proc. cinereus Gm. ? Proc. melanura Bonn. Proc. hasitata Foest., Descr. 

 Anim. 1844, 208 ; Gould, B. Aust. pi. 67 ; Puffinus hcEsilatus Lawr., Ann. 

 Lye. N. Y. vi, 5. Proc. adamastor Schlegel. Adamastor typus Bonap. 

 Puffinus cinereus Lawr. in Bd., 835; Adamastor cinereus Coues, Proc. 

 Phila. Acad. 1864, 119 ; Priofinus cinereus Coues, Proc. Essex Inst, v, 303. 

 Puffinus kuhlii Cass., Proc. Phila. Acad. 1862, 327 (err.). . melanurus. 

 ** Nasal tubes obliquely truncate, with thick septum. (Puffinus.) 

 t Below, white or nearly so, the upper parts different. 

 (^ Cinereous Shearivater. Above, pale brownish-ash, interrupted by paler 

 or white edges of the feathers, most of the upper tail coverts white ; below, 

 entirely pure white, except some slight gray touches on the flanks ; on the 

 sides of the head and neck the ash and white gradually mingling ; lining of 

 wings and axillars white ; quills dark with large white spaces on the inner 

 webs ; bill and feet mostly yellowish. Younger birds are darker, the bill 

 and feet obscured. Length about 18 ; wing 13 ; tail 5J, outer feathers nearly 

 an inch shorter ; bill 1J-, f high at base, nasal tube only about I its length ; 

 tarsus 11 ; middle toe and claw 2J. A common bird of the North Atlantic, 

 not hitherto introduced into our fauna. Proc. kuhlii Boie, Isis, 1835, 



