I Preliminary Report On the Tertiary Fossils of Alabama And Mississippi
I Preliminary Report On the Tertiary Fossils of Alabama And Mississippi
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The ab- sence of a third opening is no absolute proof, as some recent sure species of Triforis (for instance, Trif. Nigro-cinctum, Ad. , of the American Coast) usually do not show it. The number of spiral lines on the base of this German species is variable, depending mainly, but not alone, upon the size of the shell. A few of the largest specimens are distinguished by a fourth line of nodules on the last whorls.
TRIFORIS MAJOR, n. Sp. PI. 1, fig. 6.
Large ; whorls flat, lower whorls with three... longitudinal lines, formed by nodules of equal number in each line ; the nodules of the upper- most spiral are the largest and touch nearly those of the middle line ; they are rounded and separate from each other ; those of the two lower spi- rals are compressed ; the middle is the smallest and apparently last devel- oped ; base flattened, with a distinct impressed line along its margin ; length of the two lower whorls, five mm.
Locality. Claiborne, Ala.
TRIFORIS MERIDIONALIS, n. Sp. PL 2, fig.
What to read after I Preliminary Report On the Tertiary Fossils of Alabama And Mississippi?
You can find similar books in the "Read Also" column, or choose other free books by T H Truman Heminway Aldrich to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The ab- sence of a third opening is no absolute proof, as some recent sure species of Triforis (for instance, Trif. Nigro-cinctum, Ad. , of the American Coast) usually do not show it. The number of spiral lines on the base of this German species is variable, depending mainly, but not alone, upon the size of the shell. A few of the largest specimens are distinguished by a fourth line of nodules on the last whorls.
TRIFORIS MAJOR, n. Sp. PI. 1, fig. 6.
Large ; whorls flat, lower whorls with three... longitudinal lines, formed by nodules of equal number in each line ; the nodules of the upper- most spiral are the largest and touch nearly those of the middle line ; they are rounded and separate from each other ; those of the two lower spi- rals are compressed ; the middle is the smallest and apparently last devel- oped ; base flattened, with a distinct impressed line along its margin ; length of the two lower whorls, five mm.
Locality. Claiborne, Ala.
TRIFORIS MERIDIONALIS, n. Sp. PL 2, fig.
What to read after I Preliminary Report On the Tertiary Fossils of Alabama And Mississippi?
You can find similar books in the "Read Also" column, or choose other free books by T H Truman Heminway Aldrich to read onlineMoreLess
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