. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Dr. A. Giinther on Central-American Fishes. 531 teeth at all in the jaws, except that in one specimen the band of papillae passes into a series of fine moveable teeth anteriorly in the upper jaw. The head and especially the body and tail are com- pressed ; the greatest depth of the body nearly equals the length of the head, and is contained four times and a half in the total length. The upper anterior profile is nearly straight, obliquely descending. The interorbital space is
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Dr. A. Giinther on Central-American Fishes. 531 teeth at all in the jaws, except that in one specimen the band of papillae passes into a series of fine moveable teeth anteriorly in the upper jaw. The head and especially the body and tail are com- pressed ; the greatest depth of the body nearly equals the length of the head, and is contained four times and a half in the total length. The upper anterior profile is nearly straight, obliquely descending. The interorbital space is convex, one-half of the length of the head, and scaly, whilst the parts before the orbits are naked. The anterior portion of the upper lip is extremely thick, conically protruding, and nearly as long as the remainder of the snout. A narrow band of soft papillae occupies the lower parts of the lips anteriorly and. M. pi'oboscideus. laterally ; the papillae are arranged in oblique series, having a pave- ment-like appearance. The lower jaws are rather narrow, and the cleft of the mouth is much longer than broad. The maxillary is entirely hidden by the praeorbital, which has the extremity truncated and minutely serrated. The eye is much shorter than the snout, and in the present specimen, which apparently is a young one, one-fourth of the length of the head. There are twenty-three scales between the snout and the spinous dorsal fin. The latter commences somewhat nearer to the base of the caudal than to the end of the snout: the soft dorsal and the anal have series of small scales between the rays; the former is higher than the spinous dorsal, and commences above the middle of the anal fin. Caudal emarginate ; the anal is rather higher than long, as high as the soft dorsal. The pectoral is inserted above the middle of the depth of the body, and its length is four-fifths of that of the head. Silvery, upper parts greenish ; dark stripes along the series of scales. Myxus harengus. D. 4
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