. Bulletin - United States National Museum. Science. 90 U. S. NATIONAL MUSEUM BULLETIN 202 of low fleshy ridges, perhaps as a result of shrinkage in alcohol; eye very small, equal in diameter or a little larger than posterior nostril, its margin not free; anal and dorsal fin represented by a shallow groove or a very low membrane, their origin about li/^ head lengths behind a vertical line through anus; anal and dorsal membranes with- out rays, usually disappearing and beginning again about % head length in front of tip of caudal fin; both confluent with caudal fin, latter with fine fin rays; a
. Bulletin - United States National Museum. Science. 90 U. S. NATIONAL MUSEUM BULLETIN 202 of low fleshy ridges, perhaps as a result of shrinkage in alcohol; eye very small, equal in diameter or a little larger than posterior nostril, its margin not free; anal and dorsal fin represented by a shallow groove or a very low membrane, their origin about li/^ head lengths behind a vertical line through anus; anal and dorsal membranes with- out rays, usually disappearing and beginning again about % head length in front of tip of caudal fin; both confluent with caudal fin, latter with fine fin rays; anus notably behind middle of length; dis- tance from anus to tip of tail contained to times in total length; gill openings restricted to lower sides, isthmus a little narrower in width than length of snout; pectoral fin very small, almost vestigial, base extending about halfway down width of the gill opening; gill opening reaches to a point opposite upper basal edge of pectoral fin, distal edge of which broadly rounded; lateral line along middle of sides, canal ending a short distance in front of tip of tail; lips without. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
