. Fishes. Fishes. ~ -_ â ' y â _ "C / ;*!: - - " - f r-Z'i - ~ ' / ~ ~ â _ -â = _ - c ^ ""' ^. Fig. 119. Fig. 120. Fig. 121. Fig. 119.âPetromyzon marinus unicolor (De Kay). Mouth of Lake Lamprey, Cayuga Lake. (After Gage.) Fig. 120.âLampetra wilderi Jordan & Evermann. Larval brook lamprey in its burrow in a glass filled with sand. (After Gage.) Fig. 121,âLampetra wilderi Jordan & Evermann. Mouth of Brook Lamprey. Cayuga Lake. (After Gage.) eyes appear to grow out through the skin and become plainly visible and functional. The mouth is no longer filled with verti- ca
. Fishes. Fishes. ~ -_ â ' y â _ "C / ;*!: - - " - f r-Z'i - ~ ' / ~ ~ â _ -â = _ - c ^ ""' ^. Fig. 119. Fig. 120. Fig. 121. Fig. 119.âPetromyzon marinus unicolor (De Kay). Mouth of Lake Lamprey, Cayuga Lake. (After Gage.) Fig. 120.âLampetra wilderi Jordan & Evermann. Larval brook lamprey in its burrow in a glass filled with sand. (After Gage.) Fig. 121,âLampetra wilderi Jordan & Evermann. Mouth of Brook Lamprey. Cayuga Lake. (After Gage.) eyes appear to grow out through the skin and become plainly visible and functional. The mouth is no longer filled with verti- cal membranous sheets to act as a sieve, but it contains nearly one hundred and fifty sharp and chitinous teeth, arranged in rows that are more or less concentric and at the same time presenting the appearance of circular radiation. These teeth are very strong, with sharp points, and in structure each has the appearance of a hollow cone of chitin placed over another cone or papilla. A little below the center of the mouth is the oral opening, which is circular and contains a flattened tongue which bears finer teeth of chitin set closely together and arranged in two interrupted (appearing as four) curved rows extending. 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 Jordan, David Starr, 1851-1931. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectfishes
