r * 
[ 4° Jj[ 1 
Diameter than the Middle, where the Alveolus is 
lodged; but we cannot conceive the fame by the 
cylindric, fufiform, and other Belemnites , of which 
the two Ends or Extremes terminate pointed; while 
the Middle, where the Alveolus is lodged, is thick - 
and fwell’d. 
To force an Alveolus out of fuch fhaped Belem • 
nzteSy it is evident, that the narrow Ends of the faid 
Belemnites muft be quite forced open, broken, and 
(hatter'd, before a broader and more capacious Body 
could be forced through, efpeciaily to fuch a brittle 
fhattery Foffil as the Belemnites is. The evident 
Fads to the contrary of this are alfo too common 
to infift on, fince all thefe Belemnites are ever found 
regular, perfed, and intire. 
Further, let us confider the Alveoli which are 
now found in Belemnites> they are very feldom if 
ever found as mere Shells, but ever differently 
changed or petrified. They are moulded of Stone, 
Byrites, Cryflal, &c. Now it can never be argued, 
that the contained Bodies can ever be fo differently 
changed or petrified in their Covers or Shells, and 
thofe Covers or Shells which admitted fuch different 
petrifying Particles to undergo no Change or Petri- 
fication whatfoever. 
Another Proof againft this Opinion, is the divcrfe j 
Forms of Alveoli now difcover'd by Naturalifts, as 
conic, cylindric, curved, fpiral at the Apex , &c. 
whereas all Belemnites which have Cavities have 
none but conic ones. 
Thefe cylindric, &c. Alveoli are now found in 
Vomerellia in Boland , in the Marble of the Ifland of 
Oeland in the Baltick Sea belonging to Sweden , 
and in the Marble of Sweden ; in Gothland in 
Malles j 
I 
