340 



80 



81 

 82 

 83 

 84 



85 



Eheejvberg: Verbreitung und Einflufs 



Gallionella aurichalcea 



— crenulata 



— distans 



— moniliformis 



— varians? 



— sulcata 



86* Gomphonema americanum 



87 — apiculatum 



88 — coronatum 



89 — gracile 



90 — nasutum 

 91* — Pupula 



92 — subtile 



93 — turgidum 

 94* - Turris 



95 Himantidium Arcus 



96 — Monodon 



97 Meridion vernale 



98 Navicula amphisbaena 



99 

 100* 

 101 

 102 

 103 

 104 

 105 



— a 



amphigomphus 

 ? americana 

 alata 

 Bacillum 

 dilatata 



' "nis 

 gracilis 



106 Navicula lineolata 



107 — Silicula 



108 Pinnularia amphioxys 



109* 



110 



111 



112 



113* 



114 



115 



116 



117" 



118 



119 



120 



121 



borealis 



Dactjlus 



gibba 



inacqualis 



Iridis 



Legumen 



macilenta 



nobilis 



Sillimanorum 



— suecica r 



Tabellaria 



viridis 



viridula 



122 Stauroneis Baileji 



123 — gracilis 

 IIA Synedra lunaris 

 125 — spectabilis 

 126* — valens 



127 - Vlna 



128 Striatella arcuata? 



129 Surirella splendida 



130 Tabellaria trinodis. 



D. Nackte Räderthiere. 



131 Monocerca Rattus. 



E. Gepanzerte weichschalige Räderthiere. 



132 Anuraea acuminata? 133 Anuraea stipitata. 



F. Kieselerdige Pflanzentheile. 



134 Amphidiscus armatus 138 Lithodermatium jasciatum 



135 — Anchora 139 Lithodontium bicorne 



136 — Martii 140 — curvatum 



137 — Rotula 141 — furcatum 



