PLATE VITI. 



2 



Fig. I. Vaginoceras? sp. x - P- 45 



External view of an internal mould embedded in rock with sharp im- 

 pressed annular lines on its surface. 



Loc: — Pei-hu-pu, Pu-chi-hsien, SE. Hupeh. (N.R.I. Cat. No. 35) 



Fig. 2. Orthoceras chinense Foord var. eccentrica Yii. Nat. size p. 49 



Longitudinal section, showing the excentric siphuncle, the rate of 

 tapering and the septal distances. 



Loc: — Wang-chia-sze, Chung-yang hsien, SE. Hupeh. (N. R. L Cat. 



No. 18) 



Fig. 3. Orthoceras chinense Foord var. eqiiiseptatum Yu. Nat. size p. 50 



Natural polished section, showing the septal necks and the nearly equidis- 

 tant septa toward the apertural end. 



Loc: — Pei-hua-pu, Pu-chi-hsieii, SE. Hupeh. (N.R.L Cat No. 21) 



Fig. 4. Orthoceras chinense Foovdi var. equiseptatum Yii. Nat. size p. 50 



A natural section weathered so as to show a part of siphuncle and the 

 septal distances. 



Loc:— Pei-hua-pu, Pu-chi-hsien, SE. Hupeh. (N.R.L Cat. No. 22) 



Fig. 5. Orthoceras chinense Foord var. equiseptatum Yii. Nat. size p. 50 



Longitudinal section, showing the septal distances and the septal 

 necks. 



Loc: — Mei-hua-ling, Tung-chiao-cheng, King-shan-hsien, N. Hupeh. 

 (N.R.I Cat. No. 23) 



(II) gS 



