. An annotated list of Puget Sound fishes. 10 FAMILY 8. RAT-PISHES; CHIMAERIDAE. The common Rat-fish, Chimaera coUiaei (Lay and Bennett), (Pig.7) is our only representative of this curious group, which bridges thegap between the elasmobranch and teleost fishes. The gill openingsare not exposed as in the shark but are protected by an operculum asin the higher fishes. The head is clumsy and irregular and the bodytapers off to a long slender tail. The teeth resemble the incisors of arat, which accounts for the common name. The eyes are large, promi-nent and of an opalescent greenish color. In the

. An annotated list of Puget Sound fishes. 10 FAMILY 8. RAT-PISHES; CHIMAERIDAE. The common Rat-fish, Chimaera coUiaei (Lay and Bennett), (Pig.7) is our only representative of this curious group, which bridges thegap between the elasmobranch and teleost fishes. The gill openingsare not exposed as in the shark but are protected by an operculum asin the higher fishes. The head is clumsy and irregular and the bodytapers off to a long slender tail. The teeth resemble the incisors of arat, which accounts for the common name. The eyes are large, promi-nent and of an opalescent greenish color. In the Stock Photo

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. An annotated list of Puget Sound fishes. 10 FAMILY 8. RAT-PISHES; CHIMAERIDAE. The common Rat-fish, Chimaera coUiaei (Lay and Bennett), (Pig.7) is our only representative of this curious group, which bridges thegap between the elasmobranch and teleost fishes. The gill openingsare not exposed as in the shark but are protected by an operculum asin the higher fishes. The head is clumsy and irregular and the bodytapers off to a long slender tail. The teeth resemble the incisors of arat, which accounts for the common name. The eyes are large, promi-nent and of an opalescent greenish color. In the male a strangeknobbed structure is found attached to the top of the head. The bodyis beautifully mottled with gray and silvery white. The rat-fish isvaluable for the oil which is extracted from the liver. FAMILY 9. STURGEONS; ACIPENSERIDAE. Members of this family are recognized by the absence of scaleswhich are replaced by rows of great bony plates which extend alongthe sides. The snout is shovel-shaped and has five long barbels hang-ing

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