. A general guide to the British Museum (Natural History) ... With plans and a view of the building. British Museum (Natural History). LANCELET. 31 found among Fishes. In one corner are the " ganoid " scales of the modern American Bony Pike (Lepidosteus), and the African Bichir (Folypterus), alongside those of certain extinct forms. A scale of the Tarpon, or king-of-the Herrings, illus- trates thie largest development in point of size of the modern " cycloid " type. Spines of the Porcupine-fish show an extreme development of this kind of structure. Diagrams and spirit- prep
. A general guide to the British Museum (Natural History) ... With plans and a view of the building. British Museum (Natural History). LANCELET. 31 found among Fishes. In one corner are the " ganoid " scales of the modern American Bony Pike (Lepidosteus), and the African Bichir (Folypterus), alongside those of certain extinct forms. A scale of the Tarpon, or king-of-the Herrings, illus- trates thie largest development in point of size of the modern " cycloid " type. Spines of the Porcupine-fish show an extreme development of this kind of structure. Diagrams and spirit- preparations illustrate the mode of attachment and succession. Fig. 12.—A Jaw op the Pobt Jackson Shabk (fiestracion philippi), showing sharp teeth in front and crashing ones behind. of fish teeth. A large series of the teeth of Sharks and Eays displays the gradual passage from those of the ordinary point form to others arranged in a pavement-like manner and adapted solely for crushing. Both types occur in the Port Jackson Shark (fig. 12), while those of some Eays are solely of the pavement modification. Very remarkable is the dental structure in the Parrot-fish. The west end of this side of the case shows the various modifications assumed by the teeth of the modern Bony Pishes; among which, as exemplified. 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 British Museum (Natural History). London, Printed by order of the Trustees [by W. Clowes and Sons, Limited]
Size: 1642px × 1521px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishm, bookcentury1900, bookdecade1900, bookyear1906
