File:The terrestrial air-breathing mollusks of the United States, and the adjacent territories of North America- (1857) (14577969960).jpg

Identifier: terrestrialairbr05abinn (find matches)
Title: The terrestrial air-breathing mollusks of the United States, and the adjacent territories of North America:
Year: 1857 (1850s)
Authors: Binney, Amos, 1803-1847 Binney, W. G. (William Greene), 1833-1909 Gould, Augustus A. (Augustus Addison), 1805-1866
Subjects: Pulmonata Mollusks -- North America
Publisher: Boston, C. C. Little and J. Brown
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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type of Flor-ida, the septemvolva, is almost wanting. The great abundance of indi-viduals is also remarkable, showing the Region to be peculiarly adapted 1 See Vol. I. 122, which gives the limits of the corresponding Southern Interior Sec-tion such as would include these species. Several of the species of East Tennessee, also,have been found in Arkansas, —a fact also favoring a wider limit to the Cumberland Sub-Region. 2 This species has not actually been found within the limits of the State of Texas, butin the neighboring State of Arkansas and in Mississippi. To it may be applied the re-marks on Zonites significans and Polygyra Jacksoni above. 8 Either by commerce, by oceanic currents, or from some former molluscous fauna ofwhich these now isolated localities were offshoots. 4 Since the above was written, this species has been found by Dr. Newcomb near Sa-vannah, Georgia. It may therefore prove a widely distributed American species. InJamaica it is known as H. Vendreysiana, Gloyne.
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GEOGRAPHICAL DISTRIBUTION. 39 to pulmonate life. In the number of its species, also, the Texas Regionis favored; by adding to the above list of peculiar species those whichit has in common with all of the Eastern Province, and also those ofthe Southern Region, we find a total of seventy species, the same num-ber as found in Florida. On the accompanying map the Pacific Province is colored pink, theCentral Province blue; the Eastern Province (of which the northernportions are not shown) is uncolored. The subdivisions, or Regions, ofthe Eastern Province are also indicated by colored lines. The red linemarks the division between the Northern and Interior Regions. Fromthis line the last-named region extends (its Sub-Region of the Cumber-land shown by green lines) to the brown and yellow lines, which, takentogether, mark the northern boundary of the Southern Region, the yel-low separately indicating the Texan Sub-Region, the brown the FloridanSub-Region. In the above pages I have simply sta

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