300 EHRENBERG: 
Schneestaub von Sah Schnee- 
Tefferecken. ahara- |taub von 
————— Sand. Taufers. 
A. B. eunll Be D. 
Surirella Craticula Eh 
Trachelomonas laevis _ + _ = 
<= 
> 
=) 
B. Phytolitharia. 
Ampbhidiscus truncatus +! +! 
Lithasteriscus? _ _ 
Lithodontium Bursa + 
Jalcatum + 
Jurcatum 
+ 
nasulum + 
platyodon 
rostratum 
Lithostylidium Amphiodon 
biconcavum 
Catena — 
clavatum —_ 
4+4+++++ 
Clepsammidium) + 
crenulatum 
Emblema 
Lima 
+ 
polyedrum 
quadratum 
Jajula 
rostralum 
rude 
serpenlinum 
++ 4+++++ 
+++ 
| 
Serra 
spiriferum 
Trabecula 
unidentatum 
+ 
Spongolithis acicularis 
oblusa 
3 a a ae ae ae a a ee ze 
++ 1 #1 
+ I#+++ + 
EEE | 
- 
je.) 
