GEOLOGICAL SOCIETY. 



103 



A. tetragonocephalus, Green. 



Locality. Newport? New York. Silliman's Jour- 

 nal, vol. xxv. p. 336. 



A. crypturus, Green. 

 Locality. Nova Scotia. Transactions of the Geolo- 

 gical Society of Pennsylvania, vol. i. p. 37, pi. vi. 



Genus Paradoxides. Brongniart. 



P. Boltoniy Bigsby. 



Locality. Lockport, New York. Journ. of Acade- 

 my of Natural Sciences, vol. iv. p. 365, pi. 23 ; 

 Green's Monog. p. 60 ; Monthly Amer. Journ. p. 860. 



P. Harlani, Green. 



Locality. Trenton Falls? New York. Silliman's 

 Journal, vol. xxv. p. 336. 



Genus Isotelus, Dekay. 



I. gigas, Dekay. 



Localities. Trenton Falls; New York; near Cin- 

 cinnati, Ohio &c. &c; St. Joseph's, Canada. Annals 

 of New York Lyceum, vol. i. p. 185 ; Green's Monog. 

 p. 57 ; Month. Amer. Journ. p. 560. 



I. Planus, Dekay. 



Localities. Trenton Falls ; New York ; Newport, 

 Kentucky. Annals of New York Lyceum, vol. i. p. 



