fi a 
Is found in fenny fituations, but very rare; the author of the 4ui+ 
macula Infuforia, obferved it only twice. 
TRICHODA BOMBA. 
Inconftant as the former, and nearly as difficult to define; it is fome- 
__ times-{pherical, immediately. after it will become oval, Kidney fhaped, 
&c. It is very lively, and darts with much velocity; is thick, pellucid, 
and of a clay colour, or brighter. 
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