2 JOHAN KIÆR. M.-N. Kl. 



As our older collections were also found to contain remains of a new, 

 and still .undescribed Olenellns form of considerable interest, I decided to 

 undertake the description of this fauna with as good a material as possible. 



Therefore in the 'spring of 1913 I arranged for a somewhat extensive 

 excavation at the old locality, and in the present work I propose to give 

 the results that I have obtained by a study of the new material in con- 

 junction with that found in our older collections. 



Historical Review. 



The Lower Cambrian fauna at Tomten was discovered in the year 

 1870 by the well-known Swedish paleontologist J. G. O. Linnarsson ^ who 

 in that year undertook a geological journey in the Mjes district accom- 

 panied b}' A. E. TøRNEBOHM, 



He writes of this journey: "At Steen in the parish of Ringsaker we 

 find quite instructive sections at the shore of the lake. The quartz, be- 

 longing to Kjerulfs sparagmite stage, and alum shale for a considerable 

 distance lie exposed in almost vertical or slightly inverted beds. At this 

 place they do not immediately border upon each other, and the intervening 

 space is occupied by a greenish, somewhat loose clay shale, with thin cal- 

 careous seams. Numerous lines in the limestone at once indicated the 

 presence of fossils, but in spite of prolonged investigation we did not 

 succeed in finding any. At Tomten, situated not far off, the same green 

 shale were seen, but without intervening beds of limestone. 1 there col- 

 lected various comparatively well preserved but incomplete specimens of 

 a Paradoxides, which I propose to call Paradoxides Kjerulfi." Then follows 

 the first description of the new form, accompanied by 3 figures. He also 

 found a fragment of an Arionellus, which however was too poorly pre- 

 served to permit of closer description. "Both of these species", says 

 LiNNARSsoN, "are in all probability older than any Scandinavian trilobite 

 hitherto described". 



The following year this newly-discovered and interesting occurrence 

 was mentioned by Th. Kjerulf in his v/ork: "Sparagmitfjeldet" ^. He says 

 of this, page 72: "The next place to be considered is Ringsaker. The 

 entire geology of central Norway depends upon the solution of the problems 

 that are connected with the congruent strata with their orienting beds at 



1 Om några försteningar från Sveriges och Norges "Primordialzon" (Öfvers. K. Vet. Akad. 

 Förh. 187 1, No. 6, pag. 789). 



2 Universitetsprogram, 1873. 



