Antediluvian Zoology and Botany. 285 
Orthoceratites ; and, in the second, by the Belopterae. Their 
geological situation, on this authority, is as follows: — 
Lias and inferior oolite 2 species. Gault - - - 1 species. 
Lias and Oxford clay - 1 Chalk - - - 8 
Lias only - - 6 Doubtful - = 
Inferior oolite - =—6S — 
Stonesfield slate - | 50 
Oolites - - 12 — 
‘¢ T have not dared,” this author remarks, * to state that 
the secondary formations are each characterised by a division, 
or even bya particular species, of Belemnites, but that is pro- 
bable.” The examination of these species has led to the fol- 
lowing results : —That the larger their cavities are, the nearer 
they approach to the true Orthoceree; and the more they 
are adherent to the rock which contains them, the more 
ancient are they. As they recede in antiquity their struc- 
ture becomes more crystalline; but, as they approach the 
recent strata, this structure, on the contrary, becomes more 
fibrous. (jig. 74.) 
The author proceeds to notice some other genera of fossil 
bodies which possess characters and properties allied to 
Belemnites and Sepias. The entire gradation of this class, 
ascending to the Nautili, may be thus briefly stated : — 
Genera. Sp. Description. 
Actinédcamax (a } 
doubtful genus ) ; 
Belemnites - 49 With a multilocular shell. See Min. Conch. 
With a multilocular shell. Between the Belemnites 
and the Sepia, but approaching nearest to the lat- 
Without a cavity. A. vérus, of the chalk. 
Bele peraee se 2 ter: analogous to the posterior part of the bone 
of the Sepia. 
Psendehelis 3 ee a multilocular shell, but without a cavity. 
Found in chlorite chalk and lower oolite. 
Rhyncélithes - sev § Without a cavity. All belonging to ancient forma- 
tions. 
Approaching to Sépia, but resembling the beak of 
Conchorhynchus_ - a bivalve shell: perhaps a genus nearest to Te- 
rebratule. 
In the limestone of Pappenheim, absolutely re- 
sembling those with which we are acquainted 
at the present day; also in the lias of Twiver- 
ton and Keynsham, near Bristol. 
Orthoceratites, Nautilites, &c. 
Sepia - - 
ARTICULATED ANIMALS. 
Crustdcea. — Crabs and lobsters, in a mineralised state, 
have been obtained, sparingly, from several of the formations : 
commencing with dhe lias, eabundane in the London clay, and 
almost unaltered in the crag. 
U3 
