PALEONTOLOGY 



PLATE XIII. 



Scaphites wAERENi Meek 444 



Fig. 1. Side view of a small, entire specimen, showing the costse of tbe deflected portion 



directed forward more than is usual in this species. 

 Fig. 2. Lateral view of a large individual, with coarser costse than the last. 

 Fig. 3. Profile view of the same, showing the ventricose form of the volutions. 

 Fig. 4. Diagram of the second septum from the outer chamber of another large, imperfect 



individual. Enlarged to two diameters. 



Scaphites wyomingensis Meek 446 



Fig. 5. Lateral view of a specimen of the usual form and character of the variety as 



obtained from the Black Hills. 

 Fig. 6. Lateral view of a larger individual, slightly imperfect at the aperture. 

 Fig. 7. Vertical profile view of the last specimen, showing the narrow inner volution. 



Scaphites nodosus var. bre vis Meek 443 



Fig. 8. Dorsal profile of an imperfect, septate portion of a large individual, showing the 



markings and the relative thickness of the volution. 

 Fig. 9. Diagram of one of the outer septa enlarged to one and a half diameters, showing 



tbe general features of those of the group. 



Scaphites nodosus var. quadrangularis M. & H 443 



Fig. 10. Lateral view of a very perfect specimen, showing the features of the variety as 



obtained at this locality. 

 Fig. 11. Profile view of the same, showing the flattened dorsum. 



Scaphites nodosus Owen 441 



Fig. 12. Lateral view of a large individual, imperfect at the aperture, hut presenting tbe 

 characters of Dr. Owen's typical form. 



