TYPE SPECIMENS OF PALEOZOIC FOSSILS 585 



C y r t o c e r a s niacrostomum Hall. Paleon- 

 tology of New York. 1847. I:I 94> pl« 4 2 > fig- ID - 



Trenton limestone Mineral Point Wis. 



Cyrtoceras marginalis see Cyrtoceras macro- 

 stoma 



Cyrtoceras matheri see Gyroceras (Halloceras) 

 matheri 



Cyrtoceras maximum see Nautilus (Nephriti- 

 ceras) maximus 



Cyrtoceras metula Hall 



3622 12 1° 8 type Cyrtoceras metula Hall. Descriptions of 



new species of fossils from the Upper Helderberg, Hamil- 

 ton and Chemung groups. 1861. p. 44. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. in, fig. 11. 



Onondaga limestone 



Littleville, near Avon, Livingston co. N. Y. 



C. Van Deloo, coll. 1878 



Cyrtoceras morsum Hall 



3623 type Cyrtoceras morsum Hall. Descriptions of 



new species of fossils from the Upper Helderberg, Hamil- 

 ton and Chemung groups. 1861. p. 43. 



Hall. 15th annual report of the New York state cabinet 

 of natural history. 1862. pi. 9, fig. 6. 



Hall. Illustrations of Devonian fossils. 1876. Cephal- 

 opoda, pi. 46, fig. 3, 4. 



Hall. Paleontology of New York. 1879. v. 5, pt ?, 



Pi- 47, fi g- 3, 4. 



Onondaga limestone Schoharie N. Y. 



J. Gebhard purchase 



Cyrtoceras trans versum see Gyroceras trans- 

 versum 



Cyrtoceras trivolve see Gyroceras (Zittel- 

 oceras) trivolve 



Cyrtoceras undulatum see Cyrtoceras alterna- 

 tum 



Cyrtoceras [undulatum see Gyroceras (Hall- 

 oceras) undulatum 



