BY MOLECULAR COALESCENCE, 81 
the smaller crustaceans, as in the shrimp and the prawn, 
especially the latter, (if only at a proper season) in which 
there being a larger proportion of the softer constituents, 
and where consequently the process of coalescence is less 
interfered with, the globular form of the carbonate of lime 
can be seen very satisfactorily.. In these animals, mixed 
with the spherules, there are sometimes circular discs, 
containing in the centre smaller globular particles, and a 
the circumference larger ones jomed together, so as to 
present a bright crenate border. There are also patches 
of these bright globular particles arranged in a stellate 
form, assuming more of a crystalline character than in the 
dises. All these appearances can be best observed by 
merely cleansing the shells in water, and examining them 
in glycerine. Grinding is unnecessary and injurious. 
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