STUDY OF THE GRAPTOLITES. 



223 



TABLE 



Showing the Geological Distribution of the Species of Graptolitides in 



Canada and the United States. 



GENERA AND SPECIES. 



Genus Graptolitiius, Linnaeus. 



(Subgenus Monoprion, Barrande.) 



G.abnormis, Hall. 



alatus, H 



arcuatus, H 



bifidua, H.... ... 



bigsbyi, H 



bryonoides, H 



clintonensia, H 



constrictus, H 



crucifer, H 



denticulatus, H 



divergens, H 



extensus, H 



extenuatus, H 



flacciduSjf H 



flexilis, H 



fructicosus, H 



gracilis, H 



headi, H 



indentus, H 



logani, H 



logani, var., H 



milesijj H 



multifasciatus, H 



nitidus, H 



octobrachiatus, H 



octonarius, H.....*. 



patulus, H 



pennatulus, H 



quadribrachiatus, H 



raraulus, H 



richardsoni, H 



rigidus, H 



sagittarius,§ 



serratulus, 



similis, 



surcularis, 



tennuis, 



s 





H. (notHlsinger). 



H 



H..... 



H 



H. (Portlock ?) . . 



Genus Diplograptus, M^Coy. 



G. amplexicaulis, H. 



angustifoliua, H. 



ciliatus, E, 



inutilis, H. 



marcidug, H. 



mucronatus, H, 



peosta, H . 



pristis. 



H. (His. ?). 





o ^ 





tJD( 



a r 



— IS 

 9S .SI 



f Utica slate. 



X From a boulder. 



§ Probably identical with G. multifasciatus. 



