Journal of the Academy of Natural Sciences of Philadelphia

Front Cover
The Academy, 1817 - Natural history
List of members, 1812-1848 (1 p. 1., 8 p.) inserted in 2d series volume 1.

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Page 193 - ... shall be capable in law by that name and style, of purchasing, holding, and conveying any estate real or personal for the use of the said corporation.
Page 277 - P. AVARA. — Shell covered with numerous short, robust hairs ; spire convex ; whorls four, regularly rounded, with hardly elevated lines forming grooves, which are much more conspicuous near the mouth ; mouth...
Page 279 - ... four exterior volutions equally prominent, transverse diameters equal to those of the upper surface; umbilicus central, moderate, attenuated to the apex so as to exhibit the remaining volutions. Breadth, Female two-fifths, Male three-tenths of an inch.
Page 347 - ... that country, but is found in Louisiana, and extends northward to Kentucky. It is very abundant in East Florida, where it is found at all seasons in low bushes. Their notes are varied greatly, and resemble those of the thrush and blue jay.
Page 194 - The elective officers of the Society shall be a president, two vice-presidents, a corresponding secretary and treasurer, and a recording secretary; and these five officers shall constitute the Executive Council with full administrative powers.
Page 124 - ... with a large, lamelliform, elongated tooth, which appears to revolve within the shell parallel to the suture, a smaller raised line revolves nearer to the base within the shell, but becomes obsolete before it arrives at the pillar lip; umbilicus rather large.
Page 14 - Shell heterostrophe, pale yellowish, very fragile, diaphanous, oblong, whorls six or seven; spire tapering, acute at the tip; suture slightly impressed; aperture not dilated, attenuated above, about half as long as the shell; columella much narrowed near the base, so that the view may be partially extended from the base towards the apex. "Inhabits shores of Illinois. Length seven-tenths inch; greatest breadth three-tenths nearly. Animal deep black, immaculate above and beneath; tentacula setaceous;...
Page 1 - ... invite attention to this Introduction, because it applies at the present time, although nearly thirty-five years have elapsed since it was printed. " The members of the Academy of Natural Sciences, of Philadelphia, desirous of acquiring knowledge themselves, and extending it among their fellow-citizens, have for some years been accustomed to meet at leisure hours, for the purpose of communicating to each other such facts and observations as are calculated to promote the views of the Society....
Page 141 - ... and porphyry running through all the gradations from a gray rock, scarcely vitrified, to a total vitrification, and thence to a porous scoria, not unlike pumice, with transparent crystals of feldspar, taking a deeper tinge of black in proportion to the degree of vitrification. 6th. A bluish rock with feldspar, and some black crystals, having all the appearance of compact lava. If one supposes that volcanic action tends to form large cavities under the places whence the lava, &c. issues, and that...
Page 18 - Shell very much depressed, with about six whorls ; whorls striated across, with raised, parallel, acute lines, forming strongly impressed sulcae between them. Umbilicus very large, resembling an inverted spire, in diameter at least equal to the breadth of the body whorl, and exhibiting distinctly all the volutions. Diameter three-tenths of an inch.

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