1537. Cymodroma melanogaster.
The Dusky-vented Petrel.
Thalassidroma melanogaster, Gould, A. M. N. H. xiii, p. 367 (1844). Cymodroma melanogaster, Ridgway, Man. N. Am. Birds, p. 72 ; Salvin, Cat. B. M. xxv, p. 364.
Coloration. Upper parts blackish brown, head, quills, aud tail blacker, back and wing-coverts browner; upper tail-co\erts and bases of all rectrices, except the middle pair, white; lower parts to abdomen, middle of lower abdomen, and long under tail-coverts dark sooty-brown; greater part of abdomen, flanks, and wing-lining, except near the edge of the wing, white; base of feathers of throat and sometimes the ends also white.
Bill and legs black.
Length 8; tail 3; wing 6.5; tarsus 1.6; bill from gape .83.
Distribution. Southern Oceans, the range extending in the Atlantic as far north as the tropic of Cancer. A single specimen from the Tweeddale Collection, labelled " Bay of. Bengal " in the Marquis of Tweeddale's handwriting, is in the British Museum, and is the only authority for the occurrence of this species in Indian Seas. There appears, however no reason to doubt the accuracy of the label.