234 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



blotches of dark bluish stone color. The blotches are more plentiful over 

 the butt-end. Those of the same nest agree generally in color, but different 

 clutches show considerable variety of tint. Nos. 134^/ and b (original 

 number), for example, are generally of a pale olive-grey, and the blotches 

 are scarcely deeper in hue than dirty Indian-yellow." (Natural History 

 of Kerguelen Island, J. H. Kidder, M. D. Bull., No. 3, U. S. Nat. Mus. 

 p. 9, 1876.) 



Order CHARADRIIFORMES. 



Sharpe, Classif Bds. p. 72 (1891); id., Hand-List Bds. I. p. 144 (1899). 



Suborder CHI ON IDES. 

 Sharpe, Classif Bds. p. 72 (1891); id., Hand-List Bds. I. p. 145 (1899). 



Family CHiONiDiDyE, 



Sharpe, Cat. Birds, Brit. Mus. XXIV. p. 710 (1896) ; id., Hand-List Bds. 

 I. p. 145 (1899). 



Genus CHIONIS Forster. 



Type. 



CJiionis, Forster, Enchiridion Hist. Nat. p. 37 (1788) ; Sharpe, 

 Cat. Bds. Brit. Mus. XXIV. p. 710 (1896); id., Hand-List 

 Bds. I. p. 145 (1899) C. alba. 



Vaginalis, Gmelin Syst. Nat. I. p. 705 (1788) C. alba. 



ColeorJiampJius, Dumont, Diet. Sci. Nat. X. p. 36 (i 818) . . C. alba. 



Geographical Range. — Extreme southern South America and adjacent 

 islands. 



Chionis alba (Gmelin). 



White Sheath-bill, Lath. Gen. Syn. III. pt. I. p. 268, pi. 89 (1785). 



Vaginalis alba, Gm. Syst. Nat. I. p. 705 (1788). 



Chionis alba, Quoy & Gaim. Voy. Uranie, Zool. p. 131, pi. 35 (1824); 



Garn. & Less. Voy. Coq. Zool. I. p. 724 (1826); Blainv. Ann. Sci. 



Nat. VI. p. 97 (1836); Darwin, Voy. Beagle, Birds, p. 118 (1841 ; 



Falkland Islands); Gray, List B. Brit. Mus. Part III. p. 51 (1844: 



