l8 JOHAN KIÆR. M.-N. Kl.. 



of the length. Below the somewhat prominent apex the shell forms a 

 convex arc down to the anterior margin. The sculpture consists of rather 

 close, fine, but marked concentric furrows, that exhibit a certain irregular 

 and often undulating course, and presumably extremely faint radiating 

 stripes. 



The length of the shell was presumably between 14 and 15 mm. 

 (11 mm. preserved), the breadth somewhat less than 14 mm., and its 

 height about 6 mm. 



Occurrence: One somewhat imperfect specimen lying in a loose 

 and much weathered piece of sandy limestone (typical Stremiella limestone) 

 from Tomten. 



Observations: It appears that this new form should be referred 

 to the species Scenella, that contains forms from the Lower Cambrian to 

 the Ordovician. At the same time it differs in certain respects from the 

 ordinary type of this genus, as for instance, the radial striation is extre- 

 mely weak and the apex is situated nearer to the anterior margin than is 

 usually the case in the Scene/la species. In this respect the form approaches 

 Archiuacella Ulrich. I have not found any form in literature that is very 

 close to ours; but our knowledge of the Lower Cambrian Palaeacntidae is 

 still highly imperfect. It is therefore possible that the „Meioptoma^' form 

 described by Linnarsson ^ from the Kjerulfi zone at Gislöf in Skåne may 

 be near the above and tlie following forms. However, it has not yet 

 been described. 



Scenella, depressa nov. sp. 

 (PI. II, fig. 2, 2 a— c.) 



Description: The shell is broad and low, the margin forming a 

 broad oval. The apex is hardly bent down, and is situated in front of 

 the centre, at a distance from the anterior margin that is somewhat less 

 than ^/3 of the total length of the shell. The dorsal region is somewhat 

 sharp at the apex, whilst the sides of the shell are spread flat. The 

 greatest height of the shell is near the apex. The sculpture consists ot 

 fine, not particularly crowded concentric furrows, and extremely fine but 

 distinct radiating stripes or ribs. The length of the shell was presumably 

 8 — 9 mm., its breadth 7 mm., and height about 2.5 mm. 



Occurrence: One somewhat imperfect specimen in a loose and 

 much weathered piece of sandy limestone from the Holniia zone at 



' G. Linnarsson, Om faunaen i kalken med Coiiocorvphe e.viiinns (Sveriges Geo!. Under-?. 

 Ser. C. No. 35, 1879, pag. 24I. 



