EXPLANATION OF PLATE XXV. 
Fig. 
58. BELEMNITES APICICONUS. (From Yeovil.) 
v. Ventral aspect, showing an unusually definite posterior ending to the 
groove, and its continuity over the alveolar cavity. Specimen in the 
Oxford Museum, from Inferior Oolite, Yeovil. 
/. Lateral view of the same : s, section across the alveolar cavity ; v’, frustum 
seen vertically to show the distinctness of the groove. 
59. BELEMNITES BLAINVILLII. Long variety. (From Sherborne.) 
v. Ventral aspect, showing the groove reaching nearly to the apex, and dying 
out on the alveolar cavity. 
v. Another example, showing the groove certainly extending over a part of 
the alveolar space. 
/. A side view. 
s. Section across the alveolar cavity; s, section across the guard at the 
alveolar apex. 
60. BELEMNITES BuaAiNviLLu. Shorter variety. (From Sherborne.) 
v'. Ventral aspect, the groove reaching to the phragmocone. 
s’. Cross section. 
v’. Another specimen, showing the groove extended further forward. 
s”. Cross section of the same; 2”, lateral view. 
v”’. Ventral aspect of a specimen, where the groove does not quite reach the 
alveolar cavity ; s’”, cross section of the alveolar cavity. 
61. BELEMNITES CANALICULATUS. 
v _ ~-Ventral aspect 
’. Lateral aspect 
v’. Ventral aspect of a larger specimen, a little bent, from Dundry. 
s’. Cross section of the sheath ; s”, section across the alveolar cavity. 
fot a small specimen from Dundry. 
62. BELEMNITES TERMINALIS, N. S. 
‘ts Lateral view. 
v. Ventral aspect. 
s. Section across the alveolar chamber. 
s Section across the guard. 
