84 LES DIATOMEES FOSSILES D AUVERGNE 



Encyonema ctespitosum Ktz. var. Auerswaldii Y. H. (Joursac). 

 intermedium nov. so. (Joursac). 

 Grandi nov. sp. (Joursac). 



Gomphonema riu'idum nov. sp. (Moissac). 

 latestriata nov, sp. (Joursac). 



clavatum Ehrb. var. curta nov, (Moissac). 

 micropus Ktz. var. major nov. Joursac). 

 eriense Grun. (Joursac). 



var. acnminata nor. (Joursac). 

 insigne Greg. var. minor Gran. (Joursac). 

 semiapertum Grun. (Joursac). 

 brevistriata nor. sp. (Xeussargues). 

 exscissum nor. sp, (Jouivac). 

 parvum nor. sp. (Joursac). 

 accessum nor. sp. (Joursac). 



Gilloti nor. sp. (JoursacX 

 arcticum Grun. (Joursac). 

 Licmophoraoides nor. sji. (Joursac). 



Synedra joursacensis nov. sp. (Joursac). 



Ramesi nov. sp. (Xeussargues). 



Fragilaria brevistriata Grun. var. ellipiica nor. (Moissac). 



JFarrisonii Grun. var. major nor. (Joursac). 



Gustavei nov. sp. (Joursac). 



construens Gruu. var. circulare nor. (Joursac). 

 minutissima Grun. (Joursac). 



Lancettula Sclium. (Moissac). 

 Zeilieri nov. sp. (Joursac). 



var. nitzschioides nov. (Joursac). 



forma anomala nov. (Joursac). 

 bidens Heib. (Joursac). 



nitida nor. sp. (Joursac). 



var. delicatula nov. (Joursac). 



var. minor nov. (Moissac). 



Actinella pliocenica F. Herib. var. tenuistriata nor. (Chambeuil). 



var. serpantina nor. (Fraisse-Bas). 



Eunotia polydentula Ehrb. var. fossilis nov. (Joursac). 



