398 THE TUBE-NOSED SWIMMERS — TUBINARES. 



color is entirely lost along the sides under the wings and at the beginning of the under tail-coverts ; 

 while forward, on the lower part of the breast, and over the ventral region generally, the feathers 

 are spotted, barred, or finely vermiculated, in varying shades of color. The sides of the head back- 

 ward to behind the eye (where the band of color already described begins) are essentially white, 

 but the feathers immediately below the eye are obscurely banded, and there is a narrow but dis- 

 tinct transocular fascia of a dark color, which barely interrupts a broad and pure white superciliary 

 line passing from the bill to a short distance behind the eye. The forehead and crown are much 

 mixed with white. On the forehead the white forms a broad edging to the feathers, and extending 

 more narrowly around their tips, confines the plumbeous ashy to triangular central patches ; but 

 toward the crown it becomes restricted to the edges alone, and when the occiput is reached gives 

 way entirely to the uniform plumbeous of that part. 



" The peculiar color and marking of the wings, alike in both specimens, has already been so 

 well treated by Dr. Coues that I will save repeating these details by referring the reader to his 

 description, previously quoted in the present article. But in this connection it is necessary to call 

 attention to two points which are not there noticed. The first is, that the. secondaries, as well as 

 the primaries, have the white areas on their inner webs. The second, that each successive primary, 

 beginning with the first, is lighter and more plumbeous than the preceding one ; but with the first 

 secondary, the color abruptly darkens again, becoming on the exposed portion nearly black, and 

 continuing uniformly so to the tertials, which are of an equally dark cast. 



" The bill is black ; the tarsus, obscure flesh-color with a bluish tinge. The basal third of toes, 

 with contained webs, pale yellowish ; the terminal portion black, 



"Dimensions: Bill (chord of culmen), 1.03 inches; height at base, .46, width, .42; tarsus, 

 1.37 ; outer toe and claw, 1.65 ; middle, 1.70 ; inner, 1.43 ; wing, 9.88 ; tail, 3.95 ; the graduation 

 of the rectrices, .90." 



Genus BULWERIA, I!oxai>akte. 



Bulwcria, Bonap. Cat. Met. Ucc. Eur. 1842, 81 (type, Proccllaria Bulwcri, Jard. & Selby) ; Consp. 

 II. 1S50, 194. 



Ciiar. Very similar to the smaller species of CEstrelata (CE. Cooki, etc.), but tail longer and 

 more graduated, bill less compressed, and feet smaller. Myological formula said to lie very 

 different. 



The type of this species is so much like the smaller CEstrelata: (as, for example, CE. Cooki) that 

 we should hesitate to separate it generically, were it not for important anatomical differences which 

 are said to exist. The late Professor Forbes says (Zool. " Challenger " Expedition, Vol. IV. p. 60) 

 that " Hal >n riii is a peculiar form, with no very close ally, and must be regarded as a highly 

 specialized form, as shown by its myological formula . . . and its peculiar cuneate tail." The tail 

 is decidedly more graduated than in CEstrelata Cooki (which among the true CEstrelata? approaches 

 most nearly in this and other features), and the feet are relatively smaller ; but beyond these 

 differences we are unable to appreciate any external characters of importance. 



Besidos /; Bvlweri there is said to be another species, the B. Macgillivrayi, Gray, from the 

 Fiji Islands. 1 



Bulweria Bulwerii. 



BULWER'S PETREL. 



Procellaria, Bulwerii, Jard. & Sf.lry, Illustr. Orn. pi. 65. 



Tluilassidroimi Bulweri, Gould, B. Eur. pi. 448. — Key's. & Blas. Wire. Eur. 93. — Scbi.bg. Rev. 



Crit. 134. — Macgii.i.. Man. II. 264. — Gray, Gen. B. III. 648; Cat. Brit. B. 1863,224.— 



Newton, Man. N. H. Greenl. 1875, 108. 

 JEstrclata Bulwcri, Coues, Pr. Philad. Acad. 1S66, 158. 

 CEstrelata Bvlweri, Ridgw. Pr. U. S. Nat. Mas. 1S80, 209; Nom. N. Am. B. 1881, no. 718.— 



Coues, 2d Check List, 1882, no. 820. 



1 Thalassidroma [Bulweria) Macgillivrayi, Gray, Cat. B. Isl. Pacif. 1859, 56. 



