. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. TELEOSTS. 265. the head. In early life they are sym- metrical ; but very soon, in some spe- cies before reaching the length of an inch, they turn over upon one side, and the eye of the lower surface grad- ually works around to the upper side, twisting the bones of the skull in its passage. The group is nearest the gadoids, and probably these have both descended from some common ances- tor. Many of the species are valuable as food. All are bottom feeders, and some come from the deeper seas. Pleuronectid^, preopercular mar- gi
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. TELEOSTS. 265. the head. In early life they are sym- metrical ; but very soon, in some spe- cies before reaching the length of an inch, they turn over upon one side, and the eye of the lower surface grad- ually works around to the upper side, twisting the bones of the skull in its passage. The group is nearest the gadoids, and probably these have both descended from some common ances- tor. Many of the species are valuable as food. All are bottom feeders, and some come from the deeper seas. Pleuronectid^, preopercular mar- gin distinct; mouth large or moderate. Hippoglossus, halibut of northern seas ; Paralichthys; Pseicdopleiiro- nectes, winter flounders; Pleuronectes, plaice; Lophopsetta, window pane. Psetia (Rhombus), turbot (dates from the eocene). Soleid^, preopercular covered b)' skin and scales in front; mouth small and twisted. Achirus, American soles; Solea (dating from the oligocene), European sole. Fig. 265. Cranium of a plaice- (^Platessa), from Huxley, showing the' distortion of the bones; the dotted line, ali, being the middle line. EpO, epiotics; Er, frontals; Et/i, ethmoid; Pa, parietal; Prf, prefrontal; SO, supraoccipital;; Cr, position of 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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