PLATE II. 



Fig. 1. Cameroceras tenuiseptum Hall var. ellipticum Yii. Nat. size p. 24 



Polished section, showing the endotheca, size of endoconch, and the 

 closely set ectosepta. 



Loc: — Nei-chia-shan, near Sin-tan, Tze-knei-hsien, W. Hupeh. (G.S.C. 

 Cat. No. 2829) 



Fig. 2. Cameroceras tenuiseptum Hall var. ellipticum Yii. Nat. size p. 24 



View of a portion of specimen weathered so as to show the protruding 

 endoconch . 



Loc: — Nei-chia-shan near Sin-tan, Tze-kuei-hsien, W. Hupeh. (G.S.C. 

 Cat. No. 2830) 



Fig. 3. Cameroceras sp. Nat. size P- 27 



Polished section of a fragment of the specimen. The endotheca is 

 clearly shown. 



Loc: — Near Sin-tan, Tze-kuei-hsien, W. Hupeh. (G.S.C. Cat. No. 2833) 



Fig. 4. Endoceras grabaui Yii, Nat. size p. 29 



A natural weathered section, showing the length of tubi, the last 

 endoseptum and endocone. 



Loc: — Shih-lung-sze, Wang-chia-chi, I-chang-hsien, N. Hupeh. (N.R.I. 

 Cat. No. 3) 



Fig. 5. Vaginoceras endocylindricum Yii. Nat. size ' p. 33 



5a. External view of a natural weathered specimen, showing the rate of 

 tapering and the ectosepta. 



5b. Longitudinal section, showing the long empty endocylinder. The 

 section is taken nearly normal to the dorso-ventral diameter of the 

 shell. 



5c. Cross section of same, showing the form of ectoconch and the 

 position, form and size of endoconch. 



Loc: — Near Ta-fang village, Yang-sin-hsien, E. Hupeh. (G.S.C. Cat. 

 No. 2834) 



Fig. 6. Vaginoceras neichianense Yii. Nat. size p. 39 



6a. Longitudinal section of the large end of a shell with the last 

 endoseptum and endocone. 



(II) 78 



