10 FORMATION OF SHELLS OF ANIMALS, ETC., 
ticles of different degrees of excentricity, some containing 
within them one or more ellipses, more or less complete, 
and parallel with the outer one. (See Fig. 1, ¢, e, and d.) 
For the further examination of the globular carbonate, it 
will be necessary to have recourse to those formed on 
the slides, and to the deposit contained in the bottles 
above mentioned. I may observe, that mixed with these 
calculi, there are all those forms, with the exception of 
the nebulous one, which I have just described. Fig. 2 
(2 and 4) represents the forms of some of those contained 
Hips 32: 
in that deposit, and Fig. 3 represents calculi as they are 
found on the under surface of the slides. Fig. 4 repre- 
sents one form of globule sometimes found both in the 
deposit and on the slides, as well as the most perfect 
forms of the laminated calculi with radu. As _ these 
figures, being correct delineations of the artificial pro- 
ducts, will be minutely referred to when treating of the 
subject of molecular coalescence, it will not be necessary 
to give a written description of the forms of calculi of 
