82 Calcareous Pebbles formed by Algce. 



Diploneis ovalis, Hantsch. 

 Epithemia Argus, K. Scarce. 



gibba, K. 

 Eunotia Arcus, E. 

 Fragilaria Harrisonii, Grun. 



capucina, Desm. Rare. 

 intermedia, Grun. 

 mutabilis, Sm. 

 Gomphonema acuminatum, E. 



var. Brebissonii, CL Rare. 



angustatum K. var. Sarcophagus, Cl. Scarce. 



constrictum, E. Scarce. 



geminatum, Ag. Rare. 



gracile, E. Scarce. 



intricatum, K. 



var. dichotoma, Grun. 



olivaceum, E. 



subclavatum, Grun. 



Mastogloia Grevillii, Sm. Scarce. 



Smithii Thw. var. amphicephala, Grun. Scarce. 



Navicula Bacillum, E. 



cryptocephala, K. 

 cincta, E. 



var. Heufleri, Cl. (teste Cleve). 



exilis, K. 

 gracilis, K. 



gregaria, Donk. (teste Cleve). 

 ,, hungarica, Grun. 

 Menisculus, Schum. (teste Cleve). 

 Pupula, K. 

 radiosa, K. 

 var. tenella, Grun. 



Reinhardtii, Grun. 

 rhynchocephala, K. Rare. 

 Tuscula, Grun. Scarce. 

 vulpina, K. Scarce. 

 Neidium productum, Cl. Rare. 

 Nitzschia amphibia, Grun. 

 ,, angustata, Sm. 



, Denticula, Grun. (Denticula obtusa, Sm.) 

 dissipata, Grun. 



