Order. Cephalopoda.
First Division. Polythalamous Cephalopoda.
Fam. Orthocerata.
|
| 463.
|
Amplexus coralloides. (from Sow. Min. Con.)
|
| 464.
|
Orthoceratites annulatus.
|
| 465.
|
Nodosaria æqualis.
|
| 466.
|
Belemnites, with the outer coat broken to shew the alveole.
|
| 467.
|
—— portion of the alveole separated.
|
| 468.
|
—— hastatus. Hibolithes, Montf. (from Blainville.)
|
| 469.
|
Conularia quadrisulcata.
|
| 470.
|
Conilites pyramidatus, (from Blainville.)
|
| Fam. Lituacea.
|
| 471.
|
Spirula Peronii.
|
| Fam. Nautilacea.
|
| 472.
|
Nummulites buticularis, outside. Helicites, Bl. Camerina, Brookes.
|
| 473.
|
The same inside, to shew the chambers.
|
| 474.
|
Nautilus pompilius, young. See Frontispiece.
|
| 475.
|
Simplegas sulcata.
|
| 476.
|
Endosiphonites. (from Camb. Philos. Trans.)
|
| Fam. Ammonacea.
|
| 477.
|
Ammonoceras. (from Blainville.)
|
| 478.
|
Ammonites; a, break in the shell, showing the sinuous septa.
|
| 479.
|
Orbulites crassus. Globulites, Nonnul. Angulites, Montf. reduced.
|
