PALEONTOLOGY 



Pape. 

 444 



446 



PLATE XIII. 



SCAJ'UITES WARRENI Meek. 



Fig. 1. Side view of a small, entire 8|>eciineu, showing the costa- of the deflected portion 



directed forivard more lliau is usual in tJiis species. 

 Fig. 2. Lateral view of a lar;;e individual, with coarser costie than the last. 

 Fig :{. Prolile view of the same, showinj; the ventricose form of the volutions. 

 Fig. 4. I)ia;;ram of the second .septum from the outer chamber of another large, imperfect 



individual. Enlarged to two diameters. 



SCAPIIITES WYOMIXGKXS18 Meek ' 



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



obtained from the Black Hills. 

 Fig. t). 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. 



SCAPiliTES NODOSUS var. BREVis Meek 



Fig. f^. Dorsal jtrotile 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 

 the general features of those of the group. 



SCAPUITES NODOSUS Var. QUADRANGUI.ARIS M. & ft 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. 



SCAPIUTES NODOSUS O weu 441 



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

 characters of Dr. Owen's typical form. 



443 



m 



