7l8 NEW YORK STATE MUSEUM ' 



Isotelus gigas De Kay 



4510 J ^-|4i plastotype Isotelus gigas De Kay. Annals of 



the New York lyceum of natural history. 1824. 1:124, 

 pi. 13,. fig. 1. 



Trenton limestone Trenton Falls, Oneida co. N. Y. 



Albany Institute, donor 



45 1 1 — f^- hypotype: hypoplastotype Clarke. Geological survey 



of Minnesota. 1897. v. 3, pt 2 of the final report; 

 Paleontology, p. 706, fig. 8. 



Lorraine sandy shales Drift, central New York 



Isotelus gigas j^ Isotelus jacobus 



Isotelus jacobus Clarke 



4512 x 8 f 4 2 type Isotelus gigas (De Kay) Hall. Paleontology 



of New York. 1847. 1:231, pi. 61, fig. 3g. 



Isotelus jacobus Clarke. Geology of Minnesota. 

 1897. v. 3, pt 2 of the final report; Paleontology, p. 706. 



Trenton limestone Crown Point, Essex co. N. Y. 



Albany Institute, donor 



Isotelus cf. maximus Locke 



4513 T-^f-f- 2 ; hypotype Isotelus cf. maximus Locke. New York 



state museum bulletin 49. 1901. p. 59, pi. 4, fig. 1. 



Trenton conglomerate Rysedorph hill, N. Y. 



R. Ruedemann, coll. 1900 

 On slab with type of problematic crustacean, pi. 4, tig. 22. 



Isotelus obtusus Hall (sp.) 



4514 ^^4p.4 T ype Asaphus? obtusus Hall. Paleontology of 



New York. 1847. 1:24, pi. 4 bis, fig. 14. 



Chazy limestone Clinton county, N. Y. 



LEPERDITIA Rouault 



Leperditia (Isochilina) cylindrica see 

 Bythocypris cylindrica 



Leperditia fabulites Conrad sp. 



4515 ] 3 \ 6 - Q - hypotype Cytherina fabulites Conrad. Proceed- 



ings of the Academy of natural sciences of Philadelphia. 



Leperditia fabulites Ruedemann. New York 

 state museum bulletin 49. 1901. pi. 5, fig. 19, 20. 



Trenton conglomerate Rysedorph hill, N. Y. 



R. Ruedemann, coll. 1900 



