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PETRILLOSUS, Lapidosus, Gall. Pierreux. Tract. MS. de Re milit. et mach. bellic. cap.
97 :
Si ipsa(rocha)est cretosa, sive tuffosa aut Petrillosa, etc.
Si ipsa(rocha)est cretosa, sive tuffosa aut Petrillosa, etc.