THE HAMILTON ASSOCIATION. 1 35 



GASTEROPODA. 



Pleurotomaria — new species, probably — undescribed. 

 Murchisonia — 2 species — undescribed. 



LAMELLIBRANCHIATA. 



Tellinomya curta (Hall). 



elliptica (Hall). 

 Pterinea brisa (Hall). 



BRACHIOPODS. 



Streptorynchus tenuis (Hall). 



Orthis calligramma var. Davidsoni (Hall) 



" sp. (with finer Stria), undescribed perhaps. 

 Lingula perovata. 



" new species (Hall); var. L. oblata (Dawson). 

 Crania — undescribed, probably. 

 Tentaculites neglectus (Nicholson). 

 Ichnites — ^several described and figured by Dawson. 

 Arthroclema — new species, probably. 



MEDINA FOSSILS, HAMILTON, ONT. 



Genera and Species. Reference. 



Arthrophycus Harlani Hall, 1853, Pal. N. Y., Vol. II. Locality 



Grimsby. 



Pala^ophycus species Hamilton and Grimsby 



Zaphrentis bilateralis Hall, Pal. N. Y., Vol. H., 1852. Hamil- 

 ton and Grimsby. 

 Atrypa oblata Hall, 1852, Pal. N. Y., Vol. H. Hamilton 



and Grimsby. 

 Modiolopsis orthonota. . Conrad, Ann. Report, N.Y., 1839. Hamilton 



" species Dundas, Hamilton and Grimsby 



Murchisonia subulata .Conrad, 1842, Nat. Science Journal 



Hamilton. 

 Murchisonia conoidea. . .Hall, 1852, Pal, N. Y., Vol. H. Locality 



Hamilton and Grimsby. 

 Pleurotomaria litorea Hall, 1852, Pal. N. Y., Vol. H. Locality 



Hamilton and Grimsby. 



