HISTORY OF RESEARCH. 



cliii 



1004. 



Hall, T. 8., 

 " Reports on Grapto- 

 lites," ' Records Geol. 

 Surv. Victoria,' vol. i, 



pp. 217-219. 



1904. 



Tornquist, S. L., 



" Graptolites of the 



Lower Zones of the 



Scauian and Vestro- 



gothian Phyllo-Tetra- 



graptus Beds," pt. 2, 



' Lunds Universitets 



Arsskrift,' vol. 40, 



pp. 1-29, pis. i-iv. 



Identifications and lists of Graptolite species from several 

 localities in Victoria. 



In this paper, of which the first part was published in 

 1901, Prof. Tornquist completes his figures and descrip- 

 tions of the Graptolites of the Swedish strata corresponding 

 broadly to the Arenig strata of Britain. The paper is marked 

 throughout by the author's usual modesty of presentation, 

 his care for accuracy of detail, and the beauty and clearness 

 of his figures. There are four quarto plates, and an appendix 

 showing the vertical distribution of the Graptolites described 

 in the two parts of the Memoir. The Swedish species noted 

 are about forty in number and are grouped in four successive zones named by the 

 author. One genus is given as new (Anthograptus), and eight species — namely, 

 Bryograptus simplex, Tetragraptns Vestrogothus, Dichograptus regularis, Antho- 

 graptus crinitus (Moberg, MS.), and Azyograptus validus (Moberg, MS.). 



In a note in the body of the work Tornquist treats of the extreme difficulties 

 in the classification of the so-called genera and species of the compound forms 

 of the Dichograptidae in general, and gives a provisional classification of those 

 referred to in his own Memoirs. He expresses his agreement with Wiman and 

 Ruedemann, that there can be "no fundamental difference between the ' dicho- 

 tomous ' and ' lateral ' mode of division of the stipes," but notes at the same time 

 the remarkable constancy of the one or the other mode in certain forms. 



In the second of these notes the author expresses his 

 agreement with W. C. Brogger (189(3) in regarding the 

 Swedish Ordovician as commencing with the Dictijonema 

 Shales (Tremadoc), and embracing three main members : 

 (1) Dictyonema Shales; (2) Didymograptus Shales; and 

 (3) Dicellograptus Shales. In the third note he discusses the 

 synonymy of Didymograptus gibberulus, Nicholson ; Didymo. 

 patulus, Hall, and D. constrictus, Hall. 

 1904. 



This Memoir constitutes the first volume of a compre- 

 hensive Monograph by the author dealing with the Grapto- 

 lites of New York State and their relations to those of the 

 equivalent Graptolite-bearing regions elsewhere in the United 

 States, in Canada, Europe, Britain, and Australia. 



1904. 



Tornquist, S. L., 



" Sundry Geological 



Notes," nos. 2 and 3, 



' Geol. Foren. For- 



handl.,' vol. 28, 



P1 >. 497—515. 



Ruedemann, R., 



" Graptolites of New 



York, Part I ; 



Graptolites of the 



Lower Beds." ' New 



York State Museum, 



Memoir 7.' 



This first volume includes not only a description and illustration of all the 



