84 
PROFESSOR OWEN ON THE BELEMNITE. 
PLATE II. 
Fig. 1. Spathose guard and crushed phragmocone of a Belemnites Owenii. 
Fig. 2. Apical extremity of the guard, showing the ventral groove a, and the form of 
the transverse section above the groove. 
Fig. 3. A transverse section of the guard through the alveolus, showing one of the 
partitions of the phragmocone. 
Fig. 4. The guard of an embryo Belemnite. 
Fig. 5. The guard of a young Belemnite, in the condition of an Actinocamax . 
Fig. 6. A detached and crushed phragmocone, showing the folds of the capsule at r,. 
Fig. 7- A detached and crushed phragmocone in its capsule, with one of the par- 
titions, slipped forward's, 6. 
Fig. 8. A detached partition from near the base of the phragmocone. 
PLATE III. 
The specimen of Belemnites Owenii, from the Oxford clay, from the collection of the 
Marquess of Northampton, P.R.S., showing the phragmocone, muscular mantle, and 
portions of the fleshy arms, preserved in their natural relative positions. 
PLATE IV. 
Fig. 1. The specimen from the collection of S. P. Pratt, Esq., F.R.S., showing the 
phragmocone, part of the muscular mantle, lateral fins and funnel. 
c. The apex of the crushed and disturbed phragmocone. 
d. Portions of the transverse muscular tunic of the mantle. 
e , e . The two lateral fins : that on the right side is entire. 
f. The remains of the infundibulum. 
g. The levator muscles of the infundibulum. 
m. The striated horny plate ascribed to the gizzard. 
n. The remains of the ink-bag. 
Fig. 2. Section of an embalmed Calamary ( Celceno , Munster). 
PLATE V. 
The specimen from the collection of S. P. Pratt, Esq., F.R.S., showing the muscular 
mantle, head, and uncinated arms. 
d. Portions of the transversely fibrous coat of the mantle, obscured in many 
parts by apparently the remains of the pigmental coat of the skin. 
i. The uncinated arms. 
/. The remains of the eyes. 
m. The striated horny plate ascribed to the gizzard. 
