The length of the bird is 31 inches; of the bill 3⅜; of the wing, from the carpal joint to the extremity of the third quill
feather, 11; of the tail 7½; of the tarsi 2. The irides a bright blue green; the pupils black.
This bird is probably D'Azara's black Zaramagullon (No. 432 of his Birds of Paraguay), but it has not hitherto been described.
58. Phalacrocorax atriceps.—Nob. in Zool. Journal, iv. 102.
Phal. capite supra corporeque superiore atris, inferiore albo; rostro pedibusque flavescentibus, rectricibus duodecim.
The dimensions are nearly the same as those of the last bird, except those of the bill, which is a quarter of an inch longer.
59. Phalacrocorax cirriger.
Phal. supra fusco-griseus, subtus albidus; gulâ, cirroque longitudinali per collum utrinque descendente, albis; rostro pedibusque rubris; rectricibus quatuordecim.
The length of the body is 26 inches; of the bill 33⁄16; of the wing, from the carpal joint to the extremity of third quill feather, 10; of the tail 6; of the tarsi 1¾.