4)2 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



TABLE I. 



LOWER SILURIAN FOSSILS OF SCANDINAVIA, 

 AS COMPARED WITH THOSE OP OTHER REGIONS. 



Note. In this Table the Subdivisions of the Swedish Lower Silurian series are thus denoted : 

 A. S., Argillaceous slate ; Al. S., Alum slate ; O. L., Orthoceras limestone. 





c 



<u 

 13 

 cu 





M 



a 

 "5: 



0) 



Remarks. 





& 



M 



o 



1 



s 



s 



< 





Crustacea: 















Calymene bellatula Halm. - - O.L. 



+ 





+ 









ornata Halm. - - O.L. 



+ 



+? 





+ ? 







(Paradoxides bimucronatus Sil. 















Syst. ) 















Fischeri Etch. - -O.L. 



+ 



+ 











sclerops Halm. - - O.L. 



+ 













clavifrons Halm. - -O.L. 



+ 













ceutrina Halm. - - O. L. 



+ 













verrucosa Brong. - A. S. 



+ 













laciniatus Halm. - A. S. 



+ 













Trinucleus Caractaci Sil. Syst. Al. S. & 0. L. 



+ 



+ 





+ 



+ 





Lloydii Sil. Syst. - Al. S.& O. L. 



+ 







+ 







brevis sp. n. -Al.S.&O.L. 





+ 











asellus Bceck. - Al. S. & O. L. 





+ 











Asaphus platynotus - - - A. S. 



+ 













?cyllarus His. (Trinucleus) A. S. 



+ 













raniceps Halm. - - O. L. 



+ 













seticornis His. (Trinucleus) O.L. 



+ 













angustifrons Halm. - O. L. 



4 













palpebrosus Halm. - -O.L. 



+ 













(Symphisurus Gold/.) 















mucronatus - - O. L. 



+ 













extenuatus - - -O.L. 



+ 













Buchii (dilatatus var.) - O. L. 



+ 



+ 



+ 



+ 







heros (tyrannus) - -O.L. 



+ 



+ 



+ 



+ 



+ 





expansus - - - O.L. 



+ 



+ 



-r- 





a- 



Cryptonymus 

 Eichwald,He- 

 micrypturus 

 Razuinofskii 

 Green. 



var. cornutus 



+ 





+ 









Ampyx nasutus - - Al. S. & O. L. 



+ 



+ 



+ 



+ ■ 





1 Occurs in Ire- 

 land. 



Illamus crassicauda - - O.L. 



+ 



+ 



+ 



+ 



+ 





centrotus - - -O.L. 















laticauda - - - O.L. 



+ 









+ 





Olcenus scarabaeoides - - Al. S. 



+ 



+ 





+ ? 







(Anthes Gold/.) 















paradoxides - - Al. S. 















vesiculosus 















Tessini - 



+ 



+ 





f? 







(Paradoxides Br.) 















Agnostus laevigatus - Al. S. 



+ 



+ 











(Battus Halm.) 















pisiformis Brong. - Al. S. 



+ 



+ 





+ 







Moll?/ sea: 















Orthoceras duplex Wahl. - - O.L. 



+ 



+ 



+ 









vaginatus _ -O.L. 



+ 





+ 









trochlearis His. - O.L. 



+ 



+ 





+ 







tenuis - - -O.L. 



+ 



+? 





+ 





Ireland and 

 Wales. 



centralis - - -O.L. 



+ 



+ 











Lituites convolvans His. - -O.L. 



+ 



+? 



+ 









lituus His. - - -O.L. 



+ 



+ 



+ 









