NATURAL SCIENCES OF PHILADELPHIA. 123 



The bill is flesh color, tinged with brown ; mnch darker along the culmeu 

 and on the unguis ; the legs and feet are flesh colored, with a tinjie of yellow. 



This species measures from 15 to 1 (5 inches in total length ; the wing from the 

 carpus 10-50 to 11*25. The tail varies somewhat in length, from nearly five 

 to quite six inches ; the graduation of the lateral feathers usually being about 

 2 inches. Bill about 1-60; height at base -35, width -50 ; length of nasal 

 tubes "25. Tarsus 1'90 ; middle toe and c'aw 2-35. 



This species can be confounded with no other, (except, perhaps, T. chloro- 

 rhynchus, which see ;) and there are no involved points of synonymy. 



Thiellus CHLOKORHYNcnns Bp. ex Less. 



Puffiiins chlororhjinchus, Lesson, Tr. Ornith., p. 613. Pucheran, Rev. 



Zoologique, 1850, p. 633. T/iidhis chlororlnjnchus, Bp., Consp. Av., ii. 



1866, p. 201. PioceUaria chlororhijnchus, Schlegel, Mon. Proc. Mus. 



Pays-Bas, 1863, p. 25. 



Eahitat.—'- Western Australia," Bp. Dr. Schlegel has specimens from the 



Bourbon Islands and the Cape of Good Hope. 



Almost identical with T. sphcuunis in the color of the plumage : and with, 

 much the same dimensions. The main diagnostic points seem to be the fol- 

 lowing : The bill is of a greenish orange color, except along the culmen and 

 at the tip, where it is black. The bill is longer than that of sphemirus by 

 about a fourth of an inch on the average, and appea)'S a little larger at the 

 base, though quite slender in its continuity. While chlororlnjnchus is, upon 

 the whole, a larger bird than sphenurua, nevertheless the wings are abso- 

 lutely shorter (^ an inch or more) on an average. The feet are slightly 

 longer and stouter. In color the present species difi'ers slightly in being 

 rather more cinereous below ; but the difl'erence is not well marked. 



The species not as yet a well known one, nor contained in many niussea. 



NECTRIS Bp. (emend, ex Forst.) 



CJiar. — Generally similar to Puffinus ; colors uniformly fuliginous ; bill and 

 feet wholly or partially light colored. Bill long and slender, much hooked at 

 the tip ; nasal tubes short, broad, depressed, very obliquely truncated, the 

 septum broad, the nostrils narrowly oval. Wings reaching a little beyond 

 the tail, which varies in length, but is always more or less rounded. Feet 

 moderate ; tarsus about equal to middle toe without claw ; outer toe without 

 claw equal to middle ; tip of inner claw not reaching base of middle one. 



This geinis comprises five, perhaps six, species, all agreeing in the uniform 

 fuliginous of their plumage, and in the partial or entire paleness of the bill 

 and feet. In form it hardly difi'ers from Puffinus, and its retention as a valid 

 genus is perhaps questionable, except as a matter of convenience in a group 

 where it is of importance to distribute the numerous closely-allied species in 

 as many groups as may be at all characterizable. 



Nectkis fcliginosus. Keys, et Bias, ex Strickl. 



Puffinus falif/inosus, Strickland, Proc. Zool. Soc. Lond. , 1832, p. 129. 

 Lawrence, Birds N. A., 1858, p. 803, et auct. recent. Sed nou Proc. 

 fuli(/inosa, Gm., Lath., qu?e probabiliter species Thalassidromce (cauda 

 furcata ex " Otaheite ") ; nee Banks, tab. 19, Kuhl, sp. 12, pi. x. fig. 

 6 ; quae certe Pterodroma atlantica, Gould. Quid sit Proc. fiiliginosa, 

 Kuhl, p. 148, sp. 27 (e.K Banks,) nescio. — Nectris full ginosa, Keys, et 

 Bias. Wirbelt. Europ., 1840, p. 

 Puffinus major foemina ! ) Temminck, Man. Orn., iv. 1840, p. 506. Puffi- 

 nus cinertus (fcemina !), Gould, Birds Europ., pi. 445, fig. 2. 

 Hahltat. — More northern portions of the Atlantic Ocean ; especially numer- 

 ous ofi' the coast of Newfoundland ; more rarely on the European coast. 



Sp. ch. — Upper parts a uniform fuliginous brownish black, the jarimaries 

 and tail feathers of a deeper color ; under parts a much lighter fuliginous 

 1864.] 



