LIST OF ILLUSTRATIONS. VII 



Pyrgulifera (Paramelania) damoni Smith. 



Page. 

 Fig. 13. Copy of Mr. Smith's original figure. 



Pyrgulifera (Parajielania) crassigranulata Smith. 



Fig. 14. Copy of Mr. Smirh's original figure. 



Plate IV.— Larauiie aud Green River Molluscau Forms 98 



COI^BICULA BERTHOUDI (sp. UOV.). 



Fig. 1. Left side view ; natural size. 



Fig. 2. Dorsal view of another example. 



Fig. 3. Interior of left valve of another example. 



COUBICULA AUGHEYI (sp. nOV.). 



Fig. 4. Right side view ; natural size. 

 Fig. 5. ' Interior view of the same example. 

 Fig. 6. Dorsal view of another example. 



NeRITINA BRUNERI (sp. UOV.). 



Fig. 7. Lateral view; natural size. 



Fig. 8. Apertural view of the same example. 



MeLANOPSIS AMERICANA (sp. nOV.). 



Fig. 9. Two different lateral views ; enlarged. 



Fig. 10. Another view of the lower part of the same example, showing 

 the beak and the callus of the inner lip. 



Plate V. — Molluscan Forms of the Truckee Grouj) 102 



Melania sculptilis. 



Fig. 1. Copy of Meek's original figure. 



Melania subsculptilis. 



Fig. 2. Copy of Meek's original figure. 



Melania taylori. 



Fig. 3. Copy of Gahb's original figure. 



LiTHASIA ANTIQUA. 



Fig. 4. Copy of Gabb's original figure. 



Carinifex (Vorticifex) tryoni. 

 Figs. 5, 6, and 7. Different views t)f the type specimen. After Meek. 



Carinifex (Vorticifex) binneyx. 



Figs. 8 aud 9. Different views of the type specimen. After Meek. 



Ancylus undulatus. 



Fig. 10. Dorsiil view of type s]iecituen. After Meek. 

 Fig. 11. Lateral outline of the same. 



