Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/602

 placed among the vegetable fossils. It belongs to the genus Teudopsis, Deslongchamps, which is distinguished from Loligo only by the different form of its horny pen. In the recent genus the pen is lanceolate, with a long and slender shaft in front, while in Teudopsis it is spatuliform, with a short and somewhat broad shaft in front. Specimens found at Calvados show the ink-bag still preserved and in its proper position.

To this I propose to give the name of Teudopsis Brodiei. This interesting fossil was obtained by the Rev. P. B. Brodie from the insect-bed of the Purbeck series of Dorsetshire, in which he has done such important service to geology by his patient and persevering investigation of the fragmentary remains of insects buried in it.

The species hitherto known are all from the Upper Lias of France or Wurttemberg ; this species, therefore, carries the form somewhat higher in the geological series. The following diagnosis will be sufficient to distinguish it : —

Teudopsis Brodiei, sp. nov.

The horny bone anteriorly elongated and tapering to the (broadish) apex. The boundary lines of the anterior portion subconcave, extending two -thirds down the bone, where it reaches its greatest width ; the posterior portion oval, with a blunt termination. The whole surface is marked by faint longitudinal striae, which diverge outwards on the expanded portion of the bone.

EXPLANATION OF PLATE XIX.

Figs. 1-3. Oolithes obtusatus, Carr.

Figs. 1 & 2, natural size. The ruptured opening, through which the clay filling the interior obtained access to it, is shown in fig. 2. Fig. 3. Fragment of the shell, magnified, to show the markings on the surface.

Figs. 4-7, 10. Oolithes sphoericus, Carr.

Fig. 4. Specimen in which the amorphous material filling the cavity of the egg remains. Figs. 5, 6. Two views of the same egg nearly covered with its shell. Fig. 7. The internal cast of another, showing, around the edge where it is still inclosed in the matrix, portions of the shell still remaining. These figures are the size of nature. Fig. 10. Fragment of the shell, magnified, to show the markings on the surface.

Figs. 8, 11. Oolithes bathonicoe, Bucknian.

Fig. 8. Natural size. Fig. 11. Fragment of the cast of the shell, showing the markings of the surface.

Fig. 9. Fragment of the shell of a recent Turtle.

Figs. 12-17. Fluid-casts in shale from Carboniferous rocks.

Fig. 12. Exhibiting three small fruit-like casts, and a flat irregular-shaped cast. From South Wales. Figs. 13, 15. Specimens from Cape Breton, N. America. Figs. 14, 17. Specimens from South Wales. Fig. 10. Specimen from Old Cumnock, Ayrshire. All natural size.