PLATE XXVII 



PAGE. 

 Fig. 1 a. NAUTILUS (DiSCITES) ORN'ATUS 1 VAR. AMPLUS 



1 a. "View of the ventral or outer aide of the curve of an imperfect internal cast, (one-half 

 uat. diameter), showing the curves of the septa in crossing the periphery. 



1 b, A side view of same. Nautilus (Dinettes) orhatus ? var. amplus. Meek and Worthen, 

 1865. Proc. Philad. Acad. Nat. Sci., p. 265. 



Fig. 2. Gtroceras coxstrictl'm 



A side view of imperfect internal cast. Two views of this same fossil were given on 

 plate 12 of volume III; but the side view was not given there for want of room, 

 auclis added here to complete the illustration of the species as far as can be 

 done at this time. 



