PLATE VII. 



Fig. I. Orthoceras chinense Foord Vctr. knungchiaoense Yu. Nat. size p. 4S 



la. Polished section, showing the septal distances and the rate of tapering. 

 The last camera below the hving chamber is free from an}' deposit. 



lb. External view of the same, showing the growth-lines. 



ic. Cross section. 



Loc: — Near Chiang-chia-chi, Kuang-chiao-pu, King-shan-hsien, N. 

 Hupeh. (N.R.I. Cat. No. 19) 



Fig. 2. Orthoceras chinense Foord var. knangchiaoense Yii. y — p. -^S 



A natural weathered section, showing the rate of tapering and the 

 septal distances. 



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



Cat. No. 20) 



Fig. 3. Orllinccras ihyrsus? Barrandc. Nat. size p. 54 



3a. Longitudinal section of a superior portion, showing the rate of taper- 

 ing, septal necks and the septal distances. 



3b. Cross section. 



Loc: — Near Sin-tan, Tze-kuei-hsien, W. Hupeh. (G.S.C. Cat. No. 2847) 



Fig. .\. Orthoceras remotum Yii. Nat. size p. 54 



4a. A natural polished section, showing the depth of camere, the concavi- 

 ty of septa and the rate of tapering. 



4b. Cross section, showing the form of shell and the position of siphuncle. 



Loc: — Chai-tze-shan, Hsiang-yang-hsien, N. Hupeh. (N. R. L Cat. 



No. 25) 



Fig. 5. Orthoceras elongatum Yii. Nat. size p. 57 



Longitudinal section, showing the long septal distances and the rate 

 of tapering. 



Loc: — Ta-wu-shu, Chung-yang-hsien, SE. Hupeh. (N.R.I. Cat. No. 31) 



(II) 96 



