

PLATE XXXV. 



Page. 



Nautilus elegans Sowerly 163 



Fig. 1. Side view of a partly exfoliated specimen (after Meek). 



Helicoceras pari en se White 164 



Fig. 2. Septum of the type, magnified. 



Nat. Cat. Mus. Invert. Foss., 8638. 



3. A small coiled specimen showing the form of the earlier volutions. 



Nat. Mus. Cat. Invert. Foss., 22933. 



4. Copy of White's figure of the type. 



Helicoceras ? corrugatum n. sp 165 



Fig. 5. Basal view of the type specimen. 



Nat. Mus. Cat. Invert. Foss. ; 22934. 



262 



