[ 4 6 ] 
thus formed ; it will be no difficult talk to account 
for the different fedions and broken parts of the 
Belemnite ; and in what manner they were reduced to 
the feveral forms or appearances, in which we com- 
monly find them. 
The better to i Huff rate my conjedure, I ffiall firft 
exhibit fome drawings, which fhew the feveral fpe- 
cimens broken and imperfed ; and then propofe my 
fentiments concerning them before they were deferted 
by their inhabitants. Figure 6. ffiews the fpine of 
the echinus ovarius broken obliquely, as is common 
to all of them. Figure 5. exhibits the inward ftruc- 
tureof the Belemnite, when broken horizontally, with 
the central rays. Figure xi. is the fame Belemnite 
fplit through its axis. Figure xii, and xiii, are broken 
in the fame diredion as Fig. 5. and xi, and fhew 
how the feveral laminae [r] are placed one over 
another in the manner, in which it is formed. Fig. 
xiv. fhews the Belemnite in the moft perfed ftate we 
ever find it. Fig. 4. is the fufiform Belemnite found 
in chalk, which has been often taken for a fpine. a , 
which is the termination of the conical cavity, has 
been thought to be the focket of the fpine, which 
receives the papilla, when growing to the echinus } 
but, when compared with the focket of the true 
fpine [r], we find it widely different. The pricked 
lines b , c. b , c. fhew what the fufiform Belemnite 
was, when perfed, with the alveolus d , e. Many of 
[?•] Thefe diftindtions of the laminae I prefume to be owing 
to the mineral fleams infinuating themfelves into the Belemnite, 
when the fpar pervaded the pores, and deftroyed the texture, but 
.retained the true form by fubftituting its felf, and filling the 
Plafin or mould of the Belemnite. 
[r] Fig. 6 . b. 
I 
thofe 
