828 



U. S. p. R. E. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



DAPTION, Stephens. 



Daption, Steph. Shaw's Gen. Zool. XIII, 1835, 239. Type Procellaria capensis, L. 



Ch. — Bill short, broad at the base, compressed near the tip, which is curved and acute, but rather weak ; nostrils an the base 

 of the culmen, and depressed ; wings rather moderate, first quill longest ; tail short and rounded; tarsi of moderate length and 

 rather slender ; anterior toes long and united by a full web; a short spur, rather obtuse, in place of the hind toe. In form quite 

 robust. 



This genus is founded on a single species. 



DAPTION CAPENSIS, Stephens. 



The Pintado Petrel; The Cape Pigeon. 



Procellaria capensis, Linn. Syst. Nat. I, 1766, 213. — Lawr. Ann. Lye. Nat. Hist. N. Y. VI, 1853, 6. 

 Daplion capensis, Stephens, Shaw's'Gen. Zool. XIII, 1825. — Bon. Cons. Avium, II, 1855, 188. 



Sp. Ch. — Upper part and sides of the head, and hind neck plumbeous black ; back, rump, and upper tail coverts white, each 

 feather terminating with a plumbeous Iblack^mark, giving a mottled appearance to the upper plumage ; smaller wing covertB 

 plumbeous black, tipped with brown ; larger wing coverts white, margined with plumbeous black ; primaries black on the outer 

 webs and white on the inner, except near the end where they are dark ash ; secondaries white, with dark tips ; tail white, with 

 a broad terminal band of plumbeous black ; lower parts white ; bill black ; tarsi and feet brown ; the toes marked with yellow. 



Length, 15 inches ; wing, 10| ; tail, 4^ ; bill, !§ ; tarsus, 1|. 



Hab. — Oif the coast of California. 



One specimen in the collection from the southern seas. Specimen in my cabinet from the 

 California coast. 



List of specimens. 



THALASSIDROMA, Vigors. 



Thalassidrmna, Vigors, Zool. Jour. 1825. 



Ch. Bill shorter than the head, slender and weak, the tip curved and acute, the sides compressed and moderately grooved ; 



nostrils at the base of the culmen, tubular and prominent ; wings long and narrow, the second quill longest ; tail forked or 

 emarginate ; legs slender and very long ; tibia bare for a considerable space ; anterior toes rather short and slender, united by 

 an indented web ; a short spur in place of the hind toe. 



