41^ 



LACUS BAYKAL 



Surirella nobilis 



— splendida 

 Cymatopleura eiliptica 



_ Solea V. apiculata 



Campylodiscus spiralis 

 Odontìdium Harrissonii 



— hiemale 



_ » b) turgiduluin 



— mesodon 

 Meridion circulare 

 Fiagilaria capucina 



— virescens 



— construens 

 Synedra lunaris «) genuina 



— » 6) campjia 



— bilunaris 



— Vauctierise 



— gracilis 



— Ulna a) genuina 



— » jS) amphirhynclius 

 Tabellai'ia floccuiosa b) ventricosa 

 Epitlieniia turgida a) genuina 



— )) b) Westermanni 



— Sorcx 



— gibba 



— ' Zebra a) genuina 



— » 6) saxonica 



— Porcellus 

 Eunotia Diodon 



— bidens 



— » * n. V. Dybowskii 



— Papilio 

 Ceratoneis Arcus 



— lunaria 

 Melosira subflexilis 



— granulata 



— tenuis 



— hyalina 

 Ortliosira arenaria a) typica 



— » b) granulata 



— orichalcea 



— Roeseana 

 Cyclotella opereulata 



— Kuetzingiana 



— Astrala 



117 (1) =; 118 



Lac 

 Blanc 



Santo 

 Modenese 



Lago 



di 



Alleghe 



Lago 



di 



Bracciano 



Lago 

 d' Orla 



Logo 

 d' Idro 



Lago 

 Maggiore 



413 



Lago 

 di Moc- 



'01" I 12-7 010 



9 3^010 1 15- 25 0|o| 19-4 0|o|ll-86 0io|24 57 OiO| 22 OlQ | 19-4 0(0 | 4« 0,0 I lii 7 Olo 



