I916. No. 10. THE LOWER CAMBRIAN HOLMIA FAUNA. 95 



The following forms have been verified from the Holiiiia shales: 



1. Lingulclla sp.(?) Very rare, somewhat doubtful. 



2. Obolella rotuudata nov. sp. Very common. 



3. Hckionella rugosa Hall, var. acuticosta Walc. \'ery rare. 



4. Torellella laevigata, Lnrs., var. Hohni nov. var. Common. 



5. Hyolithiis corntgatus, nov. sp. X'er}' rare. 



6. Hyolitlms sp. No. i. \'ery rare. 



7. Hyolithiis sp. No. 2. Very rare. 



8. Hyolitlms sp. No. 3. \'ery rare. 



9. Volborthella tenuis Sch>l Rare. 



10. IVeymoiithia nobilis Ford. \'ery rare. 



11. Strennella primaeva Brøgger. Very common. 



12. Ellipsocephahts Nordenskjöldi Lnrs. Very rare. 



13. Holmia Kjerulfi Lnrs. Very common. 



14. Holmia grandis nov. sp. \'ery rare. 



15. Kjeriilfia lata nov. gen. »S: sp. Common. 



The fauna in the sandy limestone are more difficult to determine, for 

 beds of that kind appear to occur both in the real Holmia shales and 

 higher up in the shales, where the Holmia fauna has disappeared. 



It is true that fossil-bearing sand}' limestone beds were not found in 

 the old locality of the Holmia shales that were excavated. One bed of 

 sandy limestone that was found during the excavation, contained no fossils ; 

 but a loose fragment found by the author at Tømten in 1915, contained 

 a typical Holmia fauna as shown by the following fossils : 



1. Obolella rotundata nov. sp. 



2. Scenella depressa nov. sp. 



3. Hclcionella rugosa Hall var. acuticosta Walc. 



4. Strennella primaeva Brøgger. 



5. ElUpsocepliahis Nordenskjöldi Lnrs. 



6. Holmia Kjerulfi Lnrs. 



This is in favour of the bed belonging to a typical Holmia shale. 



Most of the other fossil-bearing sandy limestone fragments that were 

 found, contain however the remains of a fauna that differs from that of the 

 Holmia shales. All the Mesonacidae and Strennella primaeva Brøgger are 

 quite lacking there. On the other hand, we have the appearance of another 

 Strenuella form quite commonly, viz. Strennella Linnarssoni nov. sp. With 

 the latter were found a number of other forms, several of which also appear 

 in the Holmia shales. 



As we have now succeeded in preparing cranidia of Strenuella 

 Linnarssoni from the fossil-bearing sandy limestone beds that are to be 



