APPENDIX. 



77 



On the Occurrence of the Genus Dalmanites in the Lower Carboniferous Rocks 

 of Ohio. By Prof. E. W. Claypole, B.A., B.Sc. (Lond.), F.G.S., of Buchtel 

 College, Akron, 0., United States. (See ' G-eol. Mag.,' 1884, p. 303.) 



Of the abounding Trilobites which mark the faunas of the Lower and Middle 

 Palaeozoic rocks few survive into the Upper Palaeozoic. Three genera, if indeed 

 thej really deserve that name, have been described from the Carboniferous beds 

 in England — Phittipsia, Griffithides, and Brachymetopus. Only the first of these is 

 yet known to occur in American Palaeozoic strata. But on the other hand two 

 species of Proetus have been announced from America — a genus not yet recognised 

 in England. 1 It is true that the distinctions are so slight that possibly these last 

 might be as correctly referred to Phittipsia as to Proetus. As they stand, however, 

 the distribution of the North American Carboniferous Trilobites is as follows : 



Distribution of North American Carboniferous Trilobites. 



Coal-Measures Phittipsia Gliftonensis, Shum. 1858. 



„ major, Shum. 1858. 

 „ Sangamonensis, M. and W. 1865. 

 „ scitula, M. and W. 1865. 

 Chester Group „ Meramecensis, Shum. 1855. 



„ Stevensoni, Meek, 1871. 

 Keokuk Group -\ „ Lodiensis, Meek, 1875. 



> Proetus 2 auriculatus, ? Hall, 1861. 

 Cutahoga Shale ) Phittipsia bufo, M. and W. 1870. 



Portlochi, M. and W. 1865. 

 Burlington Group „ insignis, Win. 1863. 



tuberculata, M. and W. 1870. 

 Kinderhook „ 3 Doris, Win. 1865. 



Bochfordensis. Win. 1865. 

 4 Mis sour iensis, Shum. 1858. 

 Tennesseensis, Win. 1869. 

 Proetus ellipticus, M. and W. 1865. 



1 See ante, p. 57. Prof. Claypole had not seen my notice of Proetus, from the Carboniferous 

 Limestone of Ireland, when this was written. — H. W. 



2 Assigned in Miller's ' Catalogue of N. A. Palaeozoic Fossils' to the Chemung Gr. 



3 Omitted from Miller's ' Catalogue.' 



* Assigned to the Coal-Measures in Miller's ' Catalogue.' 



