. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. ELAs:\i()BRA.\(ii i:gg-cases 285. FIGURE by D. H. Fry, Jr., 1950. RATFISH Hydrolagus colliei (Lay and Bennett) The unique ratfisli egy-ease is easily distinguished from those of the sharks and skates. It is the only non-rectangular case among the shark- like fishes of California, other than the horned shark. The main body is oval, bluntly pointed anteriorly, stretching out posteriorly into a long, narrow, laterally flat
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. ELAs:\i()BRA.\(ii i:gg-cases 285. FIGURE by D. H. Fry, Jr., 1950. RATFISH Hydrolagus colliei (Lay and Bennett) The unique ratfisli egy-ease is easily distinguished from those of the sharks and skates. It is the only non-rectangular case among the shark- like fishes of California, other than the horned shark. The main body is oval, bluntly pointed anteriorly, stretching out posteriorly into a long, narrow, laterally flattened, keel-like structure. Its overall length is about 125 mm, its greatest width about 30 mm. From the dorsal sur- face the capsule looks like a large, slender tadpole. A fringed flange extending along each lateral edge together with the vertical keel keeps the case directed into the water current, so as to insure an adequate circulation to the enclosed embryo. As the embryo develops it gradu- ally fills the capsule. The head and liody occupy the anterior end, and the tail, the long narrow ))oste" ior end. The case is light tan to olive- green when first laid, but gradually becomes dark brown to black on exposure to sea water. Two cases are extruded over a period of 18-20 hours, the blunt end ai)])eariiig first. According to Dean (1903), devel- opment takes about a year and the young emerge from the egg-case as miniature 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 California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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