PLATE XXII. 
ARCHXOBATUS GIGAS, Newb. (p. 194). 
Fia. 1. Anterior tooth, natural size. 
2. Second tooth, natural size. 
3. Outlines of the four teeth represented on Pls. XXII and XXIII, constituting part of 
marginal row with ends of an interior row, seen from above, reduced. 
4, Profile of same series, reduced. 
Saint Louis limestone, Greencastle, Ind. 
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