. Fishes. Fishes. Series Plectognathi 629 immaculatus, the common species of Japan, is without spines; Ostracion sebw of Hawaii and Samoa is deep, rich blue with spots of golden. Aracana is also of East Indian origin; Ara- cana aculeata, with numerous species, is common in Fig. 533.—Hornless Trunkfish, Ladophrys trigonus (Linnieus). Tortugas, Fla. A fossil Species of Ostracion {0. micrunmi) is known from the Eocene of Monte Bolca. The Gymnodontes. — The group of Gymnodontes, having the teeth united in a turtle-like beak, carry still further the degen- Fig. 524.—Skeleton of the Cowfish,
. Fishes. Fishes. Series Plectognathi 629 immaculatus, the common species of Japan, is without spines; Ostracion sebw of Hawaii and Samoa is deep, rich blue with spots of golden. Aracana is also of East Indian origin; Ara- cana aculeata, with numerous species, is common in Fig. 533.—Hornless Trunkfish, Ladophrys trigonus (Linnieus). Tortugas, Fla. A fossil Species of Ostracion {0. micrunmi) is known from the Eocene of Monte Bolca. The Gymnodontes. — The group of Gymnodontes, having the teeth united in a turtle-like beak, carry still further the degen- Fig. 524.—Skeleton of the Cowfish, Ladophrys tricornis (Linnaeus). eration of scales and fins. There is no trace of spinous dorsal, or ventral. The scales are reduced to thorns or prickles, or are lost altogether. All the species have the habit of inflating themselves with air when disturbed, thus floating, belly up- ward, on the surface of the water. Very few, and these only northern species, are used as food, the flesh of the tropical forms being generally poisonous, and that often in a higher degree than any other fishes whatever. The Triodontidae. — The most generalized family is that of the TriodontidcB. These fishes approach the Balistida; in several. 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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