TYPE SPECIMENS OF PALEOZOIC FOSSILS 349 



ZYGOSPIRA Hall 



Zygospira (Orthonomaea) erratica Hall 



2172 ^^- HYPOTYPE : HYPOPLASTOTYPE Orthis? erratica Hall. 

 Paleontology of New York. 1847. i : 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 T 73 "i" TYPE Zygospira minima Hall. Descriptions of 

 new species of fossils from Waldron, Indiana. 1879. p. 14. 

 Hall, nth annual report of the Indiana state geologist. 

 1882. pi. 27, fig. 7. 



Niagaran Waldron Ind. 



Zygospira modesta (Say) Hall 



2 174 .s^-aa. HYPOTYPE Atrypa modesta (Say) Hall. Paleonto- 



logy of New York. 1847. i : 141. 



Zygospira modesta Hall & Clarke. Paleon- 

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



Cincinnatian Cincinnati O. 



21 75 2 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 



2176 <LJia TYPE Actinopteria auriculata Hall. Paleon- 



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

 Chemung beds Lawrenceville, Tioga co. Pa. 



A. Sherwood, coll. 1871 



Actinopteria boydi Conrad (sp.) 



2177 &&! HYPOTYPE : HYPOPLASTOTYPE Avicula boydi Con- 



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

 delphia. 1842. 8:237. 



Actinopteria boydi Hall. Paleontology of 

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

 pi. 19, fig. 7. 



