1244 NEW YORK STATE MUSEUM 



PLATE 3 



Spirifer fimbriatus mut. simplicissimus nov. 



Page 901 



1, 2 Dorsal and ventral valves. xl3. Canandaigua lake, N. Y. 



Spirifer tullius Conrad mut. belphegor Clarke 

 Page 903 

 3, 4 Dorsal and ventral views. x8. Canandaigua lake, N. Y. 



Spirifer marcyi Hall mut. pygmaeus nov. 



Page 904 



5, 6 Ventral and dorsal views. x8. Moscow and Canan- 

 daigua lake, N. Y. 



Spirifer granulosus Conrad mut. pluto Clarke 



Page 903 

 7, 8 Posterior and ventral views. xl3. Canandaigua 

 lake, N. Y. 



Spirifer medialis Hall mut. pygmaeus nov. 



Page 902 



9, 10 Posterior and ventral views. xl3. Canandaigua 



lake, N. Y. 



Trigeria lepida Hall var. pygmaea nov. 



Page 907 



11 Ventral aspect. xl3. Canandaigua lake, N. Y. 



Tropidoleptus carinatus Conrad mut. pygmaeus nov. 



Page 906 



12 Ventral aspect. x8. Canandaigua lake, N. Y. 



Spirifer mucronatus Con. mut. hecate Clarke 



Page 902 

 13-15 Posterior, dorsal and ventral views. xl3. Moscow N. Y. 



Cyrtina hamiltonensis Hall mut. pygmaea nov. 



Page 904 



16 Dorsal valve. xl3. Canandaigua lake, N. Y. 



