Orthoceras

Here, however, one is met at once with the occurrence of 'Orthoceras' and 'Baculites' at the two ends of the series, and of the fact that one of the simplest Genera, 'Nautilus', is that which now exists.

Lectures and Essays Thomas Henry Huxley 1860

Here, however, one is met at once with the occurrence of ‘Orthoceras’ and ‘Baculites’ at the two ends of the series, and of the fact that one of the simplest

Essays 2007

The primitive straight Orthoceras has now become abundant.

The Elements of Geology William Harmon Norton 1900

So far in all their various forms, whether straight, as the Orthoceras, or curved, or close - coiled as in the nautilus, the septum, or partition dividing the chambers, met the inner shell along a simple line, like that of the rim of a saucer.

The Elements of Geology William Harmon Norton 1900

The venerable Orthoceras and the Goniatite linger on through the epoch and into the first period of the succeeding era.

The Elements of Geology William Harmon Norton 1900

The Orthoceras had a long, straight, and tapering shell, divided by cross partitions into chambers.

The Elements of Geology William Harmon Norton 1900

The archaic Orthoceras lingers on into the Triassic and becomes extinct, but a remarkable development is now at hand for the more highly organized descendants of this ancient line.

The Elements of Geology William Harmon Norton 1900

Here, however, one is met at once with the occurrence of _Orthoceras_ and _Baculites_ at the two ends of the series, and of the fact that one of the simplest genera, _Nautilus_, is that which now exists.

Lay Sermons, Addresses and Reviews Thomas Henry Huxley 1860

It is said truly that the Ammonite, Orthoceras, and Nautilus of these ancient rocks were of the tetrabranchiate division, and none of them so highly organised as the Belemnite and other dibranchiate cephalopods which afterwards appeared, and some of which now flourish in our seas.

The Antiquity of Man Charles Lyell 1836

Thus the genus Orthoceras has been for the first time recognised in a

The Antiquity of Man Charles Lyell 1836