PLATE XVI. 



ErOMPHALUS PLANODISCrS. 

 Page 67. 

 Ft^. 1. The ui>i>er side of a sjwpimen preserving the shell and aui-face-niarkingrs. 

 Tig. 2. An enlarjfenient of the same. 



Figf. 3. The same side of a larger specimen, showing a different chai'acter of sui-face. 

 Fig. 4. A large internal cast, showing the size of the tube and comparative thickness of shell. 



EUOMPHALUS (StrAPAKOLLUS) IN0P8. 

 * Page 68. 



Fig. 5. The umbilical side of the specimen. Fi-om Schoharie, N. Y. 



EnoMPHALCs (Straparollus) rudis. 



Page 68. 

 Fig. 6. The upper surface of a moderately large specimen, from which the shell has been partly removed. 

 Fig. 7. 'ITie upi>er surface of a larger individual. 



EUOMPHALTTS (PhANEROTINUs) LAXtJS. 

 Page 60. 

 Fig. 8. A small specimen consisting of an entire volution. From the Hamilton group at Bellona, N. Y. 

 Fig. 9. A larger sjiecimen consisting of less than one volution. From the Hamilton group, Otsego county, N. Y. 

 Fig. 17. A si)ecimen of the species from Schoharie, N. Y. 

 Fig. 18. A specimen preseiTing the inner volutions and imprint of the outer volution. 



EuoMPHALirs (Straparollus) Hecale. 



Pago 59. 



Fig. 10. The umbilical side of a specimen of about the medium size, as obtained from a gutta-percha 

 impression in the natural mold. From Meadville, Pa. 



Figs. 11-14. A series of specimens showing the prevailing charaetere of the species as seen in this associa- 

 tion, from western New York. 



Euomphaltts (Straparollus) clymenioides. 



Page 62. 

 Fig. 15. A small specimen fi-om the Schoharie grit. Schoharie, N. Y. 



Phanerotinus parodoxus, Winchell* 



Page 60. 

 Fig. IC. One of the specimens used by Mr. Winchell in the description of the species (taken from a cast). 



* This species, which I have compared with E. (P.) Ulcus, is certainly distinct fi-om it. 



