262 REPORT ON THE STATE CABINET. 



IX, Htstofical Notice* of the Genus Graptolithus. 



Folia graminitjm Bromel. 



( Linnseus, Wahlenberg, Beck, Quenstedt, Murchison, Portlock, De 



Graptolithus \ Verneuil, Keyserling, Mather, Vanuxem, Emmons, Barrande, 



Graptolites I D'Orbign}', Geinitz, Suess, JNleneghini, M'Coy, Richter, Saltei-j 



( Nicol, Harkness, Hall, etc. 



PriOdon" Nilsson. 



Orthoceratites Wahlenberg, Schlotheim, Quenstedt, Geinitz. 



Lomatoceras Bronn, Eichwald. 



Prionotiis jSTilsson, Hisinger. 



FucoiDES Brongniart, Eaton, Emmons, Conrad, Vanuxem. 



Petalolithus Suess. 



DiPRiox (sub-genus) Barrande. 



Didymograptus M'Coy, Salter, and others. 



DiPLOGRAPTUs M'Coy, Salter, Harkness, Hall, etc. 



MoNOPEiOisr (sub-genus) . . Barrande. 



MONOGKAPTUS >_,.._, 



„ y Geimtz, Emmons. 



Cladograptds 3 



Cladograptus Carruthers, non Geinitz. 



Glossogaptus ) ^ 



-> > Emmons. 



JNemagraptus ), 



Tetragraptus •) 



-r^ > Salter. 



DiCHOGRAPTUS 5 



Cyrtograptus Carruthers. 



Climacograptus 1 



Dicranogeaptus I 



Phyllograptus 



Retiogkaptus 



Ccenograptds . . . .' I 



LOGANOGRAPTUS -' 



^ Hall. 



A. D. 1727. The graptolites of Sweden were observed by Bromel, 

 who regarded them as leaves of grasses {Ad. UpsaV). 



1736. LiNNiEus established the Genus Graptolithus in the first edition 

 of his By sterna Naturce; and some years later, in the twelfth edition, 

 introduced specific names, G. scalaris being the type of the genus. This 

 form has been regarded by Wahlenberg, Geinitz and Barrande as the 

 G. Sagittarius, compressed in a direction rectangular to the cellules. The 

 G. Sagittarius, Linn^us, is therefore regarded by the latter author as 

 the veritable historical prototype of the Genus Graptolithus and of the 

 family of graptolites. For my own part, I consider the G. scalaris, so far 

 as illustrations of that form have come under my observation, as a dis- 

 tinct type of the graptolite family. 



1821. Wahlenberg considered the graptolites of Sweden as very 

 slender orthoceratites {Nova Acta. Soc. Scien. Upsal, Vol. viii, pp. 92, 93. 



* From the earliest notice of the Genus Graptolithus to the year 1850, I have adde d but 

 little to that which has already been published by M. Barrande, in his Graptolites of Bohemia. 



