52 



Annals of the Carnegie Museum. 



Explanation of Plate VII. 



Fig. I. Lingula hubbardi Haynes, sp. nov. X 2. 



Fig. 2. Meristella barrisi Hall. X 2. 



Fig. 3. Productella spinigera Kindle. X 2. 



Fig. 4. Orbiculoidea lodiensis (Vanuxem). X 2. 



Fig. 5. Productella coloradensis Kindle. X 2. 



Fig. 6. Schuchertella chemungensis var. arctosiriaia (Hall). X 2. 



Fig. 7. Productella coloradensis Kindle. X 2. 



Fig. 8. Productella coloradensis Kindle. (Top view of specimen shown in Fig. 

 7.) X 2. 



Fig. 9. Rhipidomella vanuxemi Hall. (?). X 2. 



Fig. 10. Rhipidomella vanuxemi Hall. (Enlarged figure showing detail of 

 surface of specimen given in Fig. 9.) 



Fig. II. Leiorhynchus madisonense Haynes, sp. nov. X 2. 



Fig. 12. Leiorhynchus madisonense Haynes, sp. nov. (Dorsal valve of speci- 

 men in Fig. II.) X 2. 



Fig. 13. Leiorhynchus madisonense Haynes, sp. nov. (Ventral valve of 

 smooth-sided form.) X 2. 



Fig. 14. Leiorhynchus madisonense Haynes, var. gibbosum Haynes, var. nov. 

 X§. 



Fig. 15. Leiorhynchus madisonense Haynes, var. gibbosum. (Dorsal valve of 

 specimen shown in Fig. 14.) X |. 



Fig. 16. Leiorhynchus madisonense Haynes, var. gibbosum, (Side view of 

 same showing plications on side of shell.) X f . 



