. Guide leaflet. es precedingthe appearance of land-living animals such as frogs, reptiles, and mam-mals. The aquarium is designed as an aid in interpreting the fossils inadjoining cases, and it probably gives the more accurate picture sinceall the fishes shown were found in a single locality and in a single layer ofOld Red Sandstone (Lower Devonian). In their coloring, they have beenmade to correspond with their nearest Uving relatives. The present models show several kinds of sharks, a lungfish, twolobe-finned ganoids, and the earliest form of ganoid, Cheirolepis. Inaddition, there appear tw
. Guide leaflet. es precedingthe appearance of land-living animals such as frogs, reptiles, and mam-mals. The aquarium is designed as an aid in interpreting the fossils inadjoining cases, and it probably gives the more accurate picture sinceall the fishes shown were found in a single locality and in a single layer ofOld Red Sandstone (Lower Devonian). In their coloring, they have beenmade to correspond with their nearest Uving relatives. The present models show several kinds of sharks, a lungfish, twolobe-finned ganoids, and the earliest form of ganoid, Cheirolepis. Inaddition, there appear two fishes whose race is extinct, and whose rela-tionships are obscure. These are the Placoderms, Coccosteus and Pterich-thys. The habitat of these fishes appears to have been estuarine, freshwater, or brackish. The plants represented are from the same age andtwo of them from the same locality. The background was made byCharles R. Knight under the direction of Bashford Dean, in 1909. TELEOSTS (Bony fishes)[Case 10;. 12 ft. Blnlonj. Fig. 18. Portheus, the Giant Bulldog Fish. Drawn by Louise Nash from aphotograph of a specimen 12 feet 8 inches long, discovered by George F. Sternbergin the Kansas Chalk (Cretaceous). To this group belong the majority of food and game fishes of theworld—the Bass, Carp, Cod, Eel, Herring, etc. They are the dominanttype of fishes at the present time. They are descended from and havesupplanted the Ganoids. Many of their forms, including several orders,appeared during the Chalk Period,—the earhest being the Herrings 64 AMERICAN MUSEUM GUIDE LEAFLET (Clupeoids) and the Ten Pounders (Elopidse). An interesting series oftransition stages of connecting links can be arranged leading by almostimperceptible degrees from Ganoids to Teleosts. Structure: The Teleosts are exceedingly diverse in form, size,coloring and anatomical structure, having become adapted to the mostvaried conditions in seas and lakes and rivers. In size they rangefrom the half-inch Misiich
Size: 2413px × 1036px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
