CYCLEMYS ORBICULATA. 
two distinct moveable lobes, and the general form and aspect of the animal are 
essentially different from that genus. The true relations of the two forms I 
have endeavoured to explain above. The author just named has given this 
species the appellation of Cistuda Diardii, which must only be allowed to 
swell the list of synonyms, as the present name had been employed to desig¬ 
nate it long before, and is actually quoted as a synonym by Mons. Bibron. 
