Explanation of Plates. 517 



Scaphites warrenii M. & H. Fig. 4, side view of type (after Meek); fig. 5, 

 side view of specimen referred to S. luyomingensis (after Whitfield); fig. 6, 

 side view of another specimen (after Whitfield); fig. 7, septum of a large 

 specimen (after Whitfield). 



Scaphites ventricosus M. & H. Fig. 8, septum, magnified (after Meek); 

 fig. 9, side view of inner volutions (after Meek); fig. 10, side view of 

 another specimen (after Stanton). 



PLATE CV. — Scaphites ventricotus M. & H. Fig. 1, view of large specimen 

 (after Meek). 

 Scaphites mullananus M. & H. . Fig. 2, septum, magnified (after Meek) ; figs. 

 3, 4, two views of type (after Meek). 



PLATE CYI.—Prionocyclus ivyomingensis Meek. Fig. 1, septum of type 

 (after Stanton); figs. 2, 3, 4, views of type specimen. 



PLATE CVII. — Inoceramus altus Meek. Fig. 1, view of type. 



? Heteroceras cochleatum M. & H. Fig. 2, view of type (after Meek). 



Lucina occidentalis Morton. Fig. 3, view of specimen (after Meek). 



? Acanthoceras kanabense Stanton. Fig. 4, side view of specimen, enlarged ; 



fig. 5, septum, enlarged; fig. 6, view of large specimen. 

 Avlcula gastrodes Meek. Fig. 7, large left valve (after Stanton). 



PLATE CVIII.— Fig. 1, Scaphites conradii, side view (after Meek); fig. 2, 

 Heteroceras angulatum, view of type (after Meek); fig. 3, Scaphite.-i 

 nodosus, var. brevis, side view (after Meek). 



PLATE CIX. — Fig. 1, Inoceramus sagensis, var. nebrascensis, side view of 

 type (after Meek); fig. 2, Inoceramus cripsii, var. barabina, side view of 

 type (after Meek); fig. 3, Baculites ovatus, transverse section of shell 

 (after Meek). 



PLATE CX. — Tusoteuthis longus-, n. sp. Fig. 1, view of type specimen. 

 Belemnitella bactdus, n. sp. Fig. 2, view of type. 

 Squama spissa Logan. Fig. 3, view of type; fig. 5, view of plates. 

 Squama lata Logan. Fig. 4, view of type. 



PLATE CXI. — Stramentum haworthii Williston, figure of type specimen, en- 

 larged. 



PLATE CXII. — Uintacrinus socialis Grinnell, portion of large slab in the 

 University museum. 



PLATE CXIII. — Uintacrinus socialis Grinnell. 



PLATE CXIV. — Inoceramus truncatus, n. sp., type specimen. 



PLATE CXV. — Radiolites maximus, n. sp., interior view of three young speci- 

 mens. 



