70 explanation of plate 44 ". 
Fig. 13. Chambered alveolar cone and horny sheath of a 
large Belemnlte from the limestone of Solenhofen ; 
the calcareous sheath or Belemnite itself has dis- 
appeared. (Munster.) 
Fig. 14. Belemnites brevis ? from the Lias at Lyme ; 
Nat. size. The length of the shaft of this Belem- 
nite does not exceed that of the Beloptera (Fig. 15) ; 
a small fragment only of its alveolus is preserved, 
but the place it occupied is filled with calcareous 
spar, and the hollow cone above it with lias. (Ori- 
ginal.) 
Fig. 15. Beloptera. In this fossil we have an intermediate 
link between the Belemnite and the shell or sheath 
of Sepia oflbicinalis. a. represents the apex of the 
sheath, e. e. its posterior expansion, analogous to 
that at Fig. 4. e. e. and at Fig. 4'. e. ; e' is its ante- 
rior expansion, bearing on its internal surface an- 
nular marks derived from the transverse septa of the 
alveolus. (Blainville.) 
Plate 44". V. I. p. 374. Note. 
All the figures in this Plate are of nat. size. 
Fig. 1. Anterior Sheath and Ink-bag of Belemno-sepia, 
discovered by Miss Anning in 1828 in the Lias of 
Lyme Regis, and noticed by Dr. Buckland (Lond. 
and Edin. Phil. Mag. May, 1829, P. 388,) as “de- 
rived from some unknown Cephalopod, nearly allied 
in its internal structure to the inhabitant of the 
Belemnite.” This sheath is, for the most part, na- 
creous ; in some places {d. d.) it retains the condi- 
tion of horn. The corrug-ations on its surface indi- 
cate the lines of growth. AtJ'. a transverse fracture 
shews the neck of the ink-bag. (Original.) 
Fig. 2. The lower part of Fig. 1. seen from another side ; 
