HISTORY OF RESEARCH. 



xlvii 



In the catalogue of fossils from the Christiania district, 

 prepared by Kjerulf in 1865, figures are given of species 

 of Graptolites in Etage 2. These are (1) Dictyonema nor- 

 wegicwm, Eich., and (2) Dictyonema graptolithinum (D. 

 flabelliforme). He also records Gr. gracilis, Hall [Pterograptus, 

 cf. Holm). Under the name (3) Gr. tenuis, Portlock, 

 Kjerulf figures the branching forms subsequently named and 

 described by Lapworth as Bryograptus Kjerulfi. A few species are also recorded 

 from Etage o. From Etage 8, under the name of (I) Gr. ludensis, he figures 

 M. priodon, a second species of Monograptus, and a form Avhich is probably a 

 Cyrtograptus. 



1865. 



Kjerulf, 



" Veiviser ved geolo- 



giske excursioner i 



Christiania omegn," 



' Universitets-program 



for andet Halvaar. 



Christiania.' 



1865. 



Malaise, 



" Notes sue quelques 



fossiles du massif 



Silurien du Brabant," 



' Bull, de l'Acad. E. de 



Bruxelles,' toni. xx. 



In 1865 Malaise recorded the discovery of Graptolites in 

 the Silurian shales of Brabant, but did not adduce the names 

 of any of the specific forms obtained by himself. 



1865. 



Perk, 

 ' G-raptolithen schiefer 

 bei Lauban," ' Neues 



Jahrb.' 



In the same year four species of Graptolites, identified 

 by Geinitz as M. Sagittarius, M. priodon, M. colon us, and 

 M. Sedgiviclcii, were found by Peck in the Graptolite shales 

 near Lauban. 



1865. 



Hall, 



" Graptolites of the 



Quebec Group," ' Geol 



Surv.of Canada,' Dec. 2 



111 1865 the valuable results of Hall's long-continued 

 researches on the Graptolites of America, worked out by him 

 during the previous ten years, and already partly laid before 

 the public in various papers, were embodied in a collective and 

 exhaustive monograph entitled 'The Graptolites of the Quebec 



Group.' It will be well to give here a general summary of the whole, so as to realise 



fully the views of this great palasontologist on the Graptolites. 



The work is in the main descriptive, almost every species being illustrated by 



several drawings of great excellence. Hall acknowledges only one inclusive family 



— Graptolltidse, and gives the following table of the component genera : 



< 'lassification. 



Family Gi;ai'tolitii) i.. 



I. 



Species consisting of stipes or fronds, with a bilateral arrangement of the 

 parts; a solid axis with a common canal extending along each series of cellules. 



