Zoological Bulletin of the Division of Zoology of the Pennsylvania Department of Agriculture . in generalhighest behind the middle and composed of nine or eleven plateswith its edge meeting the plastron nearly vertically, and not flaringout around the edge of the shell. The plastron has two lobes ordoors, one in front and one behind, so arranged as to swing as onhinges, closing the shell more or less, forming a box, and thus beingresponsible for the name Box Turtles being applied to this genera and two species in this family are found in Pennsyl-vania. These may be distinguished as
Zoological Bulletin of the Division of Zoology of the Pennsylvania Department of Agriculture . in generalhighest behind the middle and composed of nine or eleven plateswith its edge meeting the plastron nearly vertically, and not flaringout around the edge of the shell. The plastron has two lobes ordoors, one in front and one behind, so arranged as to swing as onhinges, closing the shell more or less, forming a box, and thus beingresponsible for the name Box Turtles being applied to this genera and two species in this family are found in Pennsyl-vania. These may be distinguished as follows: A. Hinder or posterior lobe of the plastron about the same lengthas front or anterior lobe, both moving freely on hinges and capableof closing the shell tightly. Carapace or upper shell without pennsylvanicum (Bosc). Mud Turtle. AA. Hinder lobe of plastron longer than the front and squarelycut off behind but not notched. Both lobes but little movable andincapable of closing the shell. Carapace with keel or ridge. Arom-ochelys odoratus (Latreille). Musk Turtle. 133. Fig. 4. Mud Turtle. View of carapace, plastron and left side view of com-plete specimen. (Slightly reduced). Drawn by W. R. Walton, Artist, in theLaboratory of H. A. Surface, State Zoologist. 134 Species 5. Kinosternon pennsylvanicuin (Bosc). The Mud Turtle.[ Cinostemumpennsylvanicum (Bosc).] This Turtle is variously known by the following names: MudTurtle, Mud Terrapin, Eastern Mud Turtle, Common Mud Turtle,Pennsylvania Tortoise, Small Mud Turtle, Mud Digger, Mush Turtleand Mud Tortoise. The name of the genus is from the Greek andmeans moving breast, in reference to the lobe of the plastronwhich can be moved to close the shell. The common name MudTurtle is, of course, in reference to its frequenting muddy places,and the term Musk Turtle refers to its odor, although this nameshould be reserved for the next species. The description of the Mud Turtle is as follows, taken mostlyfrom Jordon and
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