Plate 40 



Cross sections of cephalopods showing position and size of the siphuncle 



(natural size) 



Page 



Figure 1. Ormoceras Jcimurai, new species 102 



Section cut at about middle. (See also pi. 20, fig. 9.) 



2. Ormoceras nagaoi, new species 104 



Section cut near lower end. (See also pi. 21, fig. 11.) 



3. Armenoceras tani (Grabau) 99 



Section made at upper end. (See also pi. 21, fig. 7 and pi. 

 14, fig. 2.) 



4. Ormoceras taitzuense, new species 107 



Section cut near upper end. (See also pi. 22, fig. 7.) 



5. Armenoceras kidoi, new species 88 



Section made at lower end. (See also pi. 18, fig. 9.) 



6. Armenoceras teicherti, new species 89 



Section cut near lower end. (See also pi. 19, fig. 1.) 



7. Armenoceras numatai, new species 94 



Section made at upper end. (See also pi. 26, fig. 11.) 



8. Sactoceras kohai/ashii, new species 74 



Section made at lower end. (See also pi. 14, fig. 6.) 



9. Armenoceras sondai, new species 98 



Section made at upper end. (See also pi. 20, figs. 7, 8.) 



10. Ormoceras tail, new species 106 



Section cut near upper end. (See also pi. 22, fig. 8.) 



11. Cycloceras (?) 7/iar^inoZe, new species 71 



Section cut near lower end. (See also pi. 27, fig. 5.) 



12. Armenoceras bassleri, new species 82 



Section cut near upper end. (See also pi. 22, figs. 5, 6.) 



13. Armenoceras nudum, new species 94 



Section cut near upper end. (See also pi. 20, fig. 1.) 



14. Armenoceras orientale, new species 80 



Section cut near lower end. (See also pi. 16, fig. 9.) 



15. Arm,enoceras pcnhsiense, new species 95 



Section cut ne-.ir upper end. (See also pi. 20, fig. 6.) 



16. Ormoceras manchuriense, new species 103 



Section cut near upper end. (See also pi. 27, fig. 6.) 



17. Orthoceras toyamai, new species 67 



Section cut near lower end. (See also pi. 13, fig. 4.) 



18. Sactoceras nitihsinense, new species 75 



Section cut at about middle. (See also pi. 14, fig. 13.) 



147 



