Fig. 12. 



IS. 



Chihlioceras nathani Grabau ...................................................................... 



Another section through the same specimen parallel to the preceding and about 

 2mm. farther dorsad. The section is shown on the opposing cut surface of the rock 

 and its position is therefore reversed as here viewed. (For location cee text fig. 6, 

 linec-d, also text Figs. 8,9 which show the two sections in the same orientation). 

 IVilint/.e limestone, Shih-Mun-Chai region, Cliihli. F. F. Mathieu Coll. (Cotype G 



S. Ch. Cat. No. 111,1. (See, also, Pis. IV & V). 



chingwangtaotme Grabau .................. ......................................... p. ,51 



l:.Ja. View of the type from the upper or dorsal side. Natural size. The specimen is 

 reversed in position as compared with the other figures, to show the median 

 alveolus, and the inner surfaces of the lateral alveoli. (For restored sections see 

 text figures 14-16). 



13b. Side view of the same. 



1'eilintze limestone, Pei-Lin-T/.e, Shih-Mun-Chai region, eastern Cliihli. (IIololvpc, 

 Coll. by F. F. Mathieu, G. S. Ch. Cat. No. 113). 



105 



