JOHAN KIÆR. M.-N. Kl, 



found in the small remainder of grey-green shales at Evjeviken, and these 

 distinctly correspond with the sandy limestone beds that were demonstrated 

 b}' Th. Münster above the Hohnia shales in several sections on the west 

 side of Mjesen, I consider that I have proved the existence of a new fossil- 

 bearing zone at the uppermost part of our Lower Cambrian. 

 This zone I have named the zone with Strennella Linnarssoni, or the 

 Strenuella limestone. 



In the grey- green shales that surmount the Strenuella limestone at 

 Evjeviken, I have not personally found traces of fossils. On the other hand 

 Schmalensee appears to have found Obolella rotundata nov. sp. and Acro- 

 thele bellapunctata Walcott in them. In fact Walcott states for the lattter 

 "Shales in upper portion of Olenellus Kjcrulfi zone near Lake Mjesen, 

 Province of Hedemarken, Norway". 



The fauna in the zone with Strenuella limestone should thus contain 

 the following forms: 



1. Obolella rotundata nov. sp. Very rare. 



2. Obolella (Glyptias) favosa Lnrs. Very rare. Possibly from this locality, 

 but somewhat doubtful. 



Acrothele bellapunctata Walcott. \'ery rare. 

 Scenella aniiqua nov. sp. Very rare. 

 Helcionclla cf. rugosa Hall var. Very rare. 



Torellella laevigata Lnrs. var. Holnii nov. var. Rare. 



7. Strenuella Linnarssoni nov. sp. Very common. 



8. Ellipsocephalus Nordenskjöldi Lnrs. Common. 



The most remarkable feature of this fauna is that Mesonacidae appears 

 to be quite absent. However, there can be no doubt that we have under 

 consideration a Lower Cambrian fauna. Several forms are common wath 

 those of the Hohnia shales, and others are very closely allied with forms 

 in that occurence.. Its most important type fossil, as we have stated, is 

 Strenuella Linnarssoni nov. sp. 



Besides these two zones, it has been shown of late that there is a 

 third faunistic zone of Lower Cambrian age, viz. the zone with Disci- 

 nella Holsti below the Hohnia shales; it was discovered by Amanuensis 

 Johan Brastad, during investigations of the oldest fossil-bearing strata on 

 the west side of Mjesen, north of Gjøvik, and was described in 1915 ^ 



This zone belongs to the oldest of the green shales, wherein we also 

 find the two other zones. Above the quartz sandstone that as we have 



1 Discinella Holsti-faunaen ved Braastadelven nord for Gjovik (Norsk Geologisk Tids- 

 skrift, Bd. III, No. 5, 1915). 



