Trachea of uniform diameter, furnished with one pair of sterno-tracheal muscles, from which a few fibres descend on each side to the upper rings of the bronchiæ; œsophagus of large diameter to about half its length, where it is furnished with a craw, and afterwards contracted to the proventriculus; the craw where it is connected with the œsophagus is much contracted, afterwards it expands into a large sac; proventriculus small; gizzard large, and very muscular; the grinding surfaces hard, concave in the middle, and furnished with longitudinal grooves in the concave part; the intestinal canal is of moderate length, small next the gizzard, largest at the entrance of the cæca, from whence it slightly tapers to the cloaca, which is small; cæca long, of greatest diameter at the opposite extremity to their entrance into the rectum; the gizzard and œsophagus were filled with reeds, mixed with very small pebbles; liver bilobed. Length of œsophagus from glottis to gizzard 3 inch. from œsophagus to outer extremity of craw ¾ inch. Perpendicular diameter of craw 7 lines Inches Greatest diameter of gizzard obliquely to the grinding surfaces 1 Diameter parallel to the grinding surfaces ¾ Length of intestine from gizzard to cloaca 13 from cæca to cloaca 1¾ of cæca 3 A second specimen, a female, did not differ, except in sex. Skeleton light; bones in general thin. Sternum broadest posteriorly, and indented on its posterior margin with two large fissures; keel deep, its inferior edge rounded, much scolloped out anteriorly; a moderate size bifid manubrial process between the junction of the coracoids. Pelvis broad, of moderate length, similar to that found among the genus _Strepsilas_. Os furcatum much arched, furnished with a small flattened process, where the ligament unites it to the sternum; coracoid of moderate length, strong, furnished with a large process externally near their junction with the sternum; ribs flattened, posterior process long, slightly curved, and narrow.