TYPE SPECIMENS OF PALEOZOIC FOSSILS 225. 



1329 1S ^ A hypotype Hall & Clarke. Paleontology of New York. 

 1894. v. 8, pt 2, pi. 28, fig. 53. 



Hamilton beds Thedford Ont. 



Cyrtina triquetra Hall 

 !33 x ^f A hypotype Cyrtia triquetra Hall. Geological survey 

 of Iowa. 1858. v. 1, pt 2, p. 513. 



Cyrtina triquetra Hall & Clarke. Paleontology 

 of New York. 1894. v. 8, pt 2, pi. 28, fig. 34, 35. 



Hamilton beds Davenport la. 



Cyrtina umbonata Hall var. alpenensis Hall & Clarke 



1331 73 ! 85 type Cyrtina umbonata Hall var. alpenensis 



Hall & Clarke. Paleontology of New York. 1894. 

 v. 8, pt 2, p. 362, pi. 28, fig. 18. 



Hamilton beds Alpena Mich. 



1 33 2 TYPE Hall & Clarke. Paleontology of New York. 1894. 

 v. 8, pt 2, pi. 28, fig. 19. 



Hamilton beds Alpena Mich. 



*333 TYPE Hall & Clarke. Paleontology of New York. 1894 



v. 8, pt 2, pi. 28, fig. 20. 



Hamilton beds Alpena Mich. 



Cyrtina varia Clarke 

 *334 73 i 86 type : plastotype Cyrtina varia Clarke. New York 

 state museum memoir 3. 1900. p. 49, pi. 6, fig. 15. 

 Oriskanian Becraft mountain, Hudson N. Y. 



1335 i^-S- type Clarke. New York state museum memoir 3. 1900. 

 pi. 6, fig. 16-18. 



Oriskanian Becraft mountain, Hudson N. Y. 



!33 6 iS-^A type Clarke, New York state museum memoir 3. 1900. 

 pi. 6, fig. 19. 



Oriskanian Becraft mountain, Hudson N. Y. 



1337 71 y 6 type Clarke. New York state museum memoir 3. 1900. 

 pi. 6, fig. 20, 21. 



Oriskanian Becraft mountain, Hudson N. Y. 



-133S ■ 7 - 3 ^ § type Clarke. New York state museum memoir 3. 1900. 

 pi. 6, fig. 22. 



Oriskanian Becraft mountain, Hudson N. Y. 



