BELEMNITES OF THE OOLITE. 101 
(Mr. Read). Specimens occur in the Yorkshire Museum, Museums of Whitby, the Scar- 
borough Phil. Soc., &c. 
Observations. Oyster shells adhere frequently to the apicial region of the sheath, 
which is always more or less incomplete and eroded. This short form is conjectured by 
DOrbigny to be the female of B. giganteus (B. Aalensis, Voltz). The two forms must 
be regarded as closely allied. 
On THE CANALICULATED BeLeMnires or THE INFERIOR Oourre (PL. XXV). 
Miller, in his account of Belemnites sulcatus (‘ Geol. Trans,’ 2nd ser., vol. ii, pl. vii 
figs. 3, 4, 5), gives for localities, ‘‘ Dundry, near Oxford, Inferior Oolite.” His fig. 
_ appears to represent B. apiciconus of Blainville, which occurs frequently in the Inferior 
Oolite, but has not yet been found near Oxford. Fig. 5 I have always supposed to repre- 
sent a fossil from the Oxford Clay. It seems to be copied or modelled from specimens 
which still exist in the Bristol Museum, and are marked “ B. su/catus,’ Inferior Oolite. 
In the lowest beds of the Inferior Oolite of the south of England, generally, among 
the most frequent Belemnites are those of the type of B. apiciconus, Blainville. ‘To 
judge from examples collected by Mr. Buckman near Sherborne, and by myself near 
Yeovil, there are two other distinguishable forms, of a slenderer figure, one canaliculated to 
the apex or very near it, the other not carrying its groove so far backward. ‘To these 
there may be added the fossil called in my work on the Yorkshire Coast B. anomalus, and 
there quoted from the Kelloways Rock. It belongs really, I believe, to the Grey Lime- 
stone of Gristhorpe. None of these, so far as I yet know, have the fusiform or hastate 
shape in any period of their growth; but I have not met with very young forms of any 
one of them. They are all distinct from the canaliculated Belemnites of Stonesfield, and 
never exhibit much of that depression in the post-alveolar region which always belongs to 
the allies of B. fusiformis of Miller. 
BELEMNITES aPiciconus, Blaiaville. Pl. XXV, fig. 58. 
Reference. Belemnites apiciconus, Blainv., ‘Mém. sur les Bélemnites,’ p. 69, pl. u, 
fig. 2, 1827. 
B. canaliculatus, Quenstedt, ‘Der Jura,’ p. 411, pl. lvi, fig. 6, 1858 ; 
‘Cephalop.,’ p. 439, pl. xxix, fig. 6, 1849. 
Guarp. Cylindrical in the middle, tapering in a curve to a pointed apex. Ventral 
surface marked by a deep narrow groove, which is continuous for the whole length, 
