TYPE SPECIMENS OF PALEOZOIC FOSSILS 349 



ZYGOSPIRA Hall 



Zygospira (Orthonomaea) erratica Hall 



2172 95 1 9 ° hypotype: hypoplastotype Orthis? erratica Hall. 



Paleontology of New York. 1847. 1 : 288. 



Zygospira (Orthonomaea) erratica Hall 

 & Clarke. Paleontology of New York. 1894. v. 8, pt 2, 

 pi. 54, fig. 22. 



Lorraine beds Drift block of central New York 



Zygospira minima Hall 



2 1 73 - L r L type Zygospira minima Hall. Descriptions of 



new species of fossils from Waldron, Indiana. 1879. P* I 4* 

 Hall, nth annual report of the Indiana state geologist. 



1882. pi. 27, fig. 7. 



Niagaran Waldron Ind. 



Zygospira modesta (Say) Hall 



2174 -^j 2 -- hypotype Atrypa modesta (Say) Hall. Paleonto- 



logy of New York. 1847. 1 : 141. 



Zygospira modesta Hall & Clarke. Paleon- 

 tology of New York. 1894. v. 8, pt 2, p. 155, fig. 148. 



Cincinnatian Cincinnati O. 



21 75 aj y L£ hypotype Hall & Clarke. Paleontology of New York. 



1894. v. 8, pt 2, p. 155, fig. 149. 



Cincinnatian Cincinnati O. 



LAMELLIBRANCHIATA 

 ACTINOPTERIA Hall 



Actinopteria auriculata Hall 



2 1 76 *<^£ type Actinopteria auriculata Hall. Paleon- 



tology of New York. 1884. v. 5, pt 1, pi. 84, fig. 15. 

 Chemung beds Lawrenceville, Tioga co. Pa. 



A. Sherwood, coll. 187 1 



Actinopteria boydi Conrad (sp.) 



2177 '■"'," I hypotype: hypoplastotype Avicula boydi Con- 



rad. Journal of the Academy of natural sciences of Phila- 

 delphia. 1842. 8:837. 



Actinopteria boydi Hall. Paleontology ot 



New York. 1883. v. 5, pt 1, plates and explanations, 

 pi. 19, fig. 7. 



