GRAPTOLITES. 59 
§ VIII.—HISTORICAL NOTICE* OF THE GENUS GRAPTOLITHUS. 
Folia GRAMINEUM. .-..Bromel. 
{ Linnzeus, Wahlenberg, Beck, Quenstedt, Mur- 
GRAPTOLITHUS.++«-- chison, Portlock, De Verneuil, Keyserling, 
Mather, Vanuxem, Emmons, Barrande, D’Or- 
GRAPTOLITES ..2+--- bigny, Geinitz, Suess, Meneghini, McCoy, 
Richter, Salter, Nicol, Harkness, Hall. 
PRIODON «ee+.ee «.«e- Nilsson. 
ORTHOCERATITES....... Wahlenberg, Schlotheim, Quenstedt, Geinitz. 
LOMATOCERAS -....+- Bronn, Hichwald. 
PRIONOTUS. «24 eeeess- Nilsson, Hisinger. 
FUCOIDES--.....05 ...Brongniart, Eaton, Emmons, Conrad. 
PETALOLITHUS.-.+.+-- Suess. 
Diprion (sub-genus) .. Barrande. 
DipymoGRAPTUS ...---McCoy, Salter, and others. 
DIPLOGRAPTUS.... +++. McCoy, Salter, Harkness, etc. 
Monoprion (s.-gen.) .. Barrande. 
MoNOGRAPTUS «...+-- ey 
Geinitz, Emmons. 
CLADOGRAPTUS ..-.- 
GLOSSOGRAPTUS..... 
NEMAGRAPTUS,..2+0- | Hmmons. 
TETRAGRAPTUS.-.... 
DICHOGRAPTUS .-.... | satter. 
A. D. 1727. The graptolites of Sweden were observed by Bromel, 
who regarded them as leaves of grasses. (Act. Upsal.) 
1736. Linneus established the genus Grraptolithus in the first edition 
of his Systema Nature; and some years later, in the twelfth edition, 
introduced specific names, (@. 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., 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 distinct 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 and 93.) 
1822. Schlotheim, participating in the opinion of Wahlenberg, described 
and figured a species under the name Orthoceratites serratus. (Petrefak- 
enkunde, p. 56, pl. viil, fig. 3.) 
* From the earliest notice of the genus Graptolithus to the year 1850, I have added 
but little to that which has already been published by M. Barrande in his Graptolites 
of Bohemia. 
