410 
Orthoceras annulatum Sowb; Ichthyodorulithis, 
abruptum Closteroerinus enngatus 
Cornulites flexuosus Glyptocrinus plumssus 
Discosorus coneidens Ichihyocrinus elintörensis 
Myalina mytiliformis Caryocrinus ornatus Say 
Modiolopsis ovatus Tentaculites minutus 
subearinalus distans 
Tellinomya elliptica Cybele punctata 
Pentamerus ovalis Calymene Clintoni (Vanx.) 
Leptaena obscura Blumenbachi autor 
Platyostoma Sp. Phacops trisulcatus 
Orthoceras clavalum Ceraurus insignis Beyr. 
Homalonotus delphinocephalus Beyrichia lata (Vanx.). 
4. Die Niagaragruppe ist die reichhaltigste, doch nur an thieri- 
schen Resten, denn Pflanzen fehlen gänzlich. 
Streptelasma calicula 
Polydilasma turbinatum 
Caninia bilateralis 
Conophylium niagarense 
Diplophylium caespitosum 
Syringopora multicaulis 
Astrocerium venustum 
parasilicum 
pyriforme 
> constrictum 
Favosites niagarensis 
favosa (Goldf.) 
Catenipora escharoides Lk. 
agglomerala 
Heliolites elegans 
spirispora (Lonsd.) 
pyriformis Guet. 
macrostylis 
Stromatopora concentrica Goldf. 
Cladopora seriata 
caespitosa 
cervicornis 
fibrosa 
multipora 
macrophora 
reticulata 
Limaria ramulosa 
fruticosa Steing. 
laminata 
Callopora elegantula 
florida 
laminata 
aspera 
nummiformis 
Trematopora tuberculosa 
coalescens 
tubulosa 
punctata 
ostiolata 
solida 
striata 
granulifera 
aspera 
= 
Trematopora spinulosa 
sparsa 
Striatopora flexuosa 
Stictopora punclipora 
Diamesopora dichotoma 
Clathropora aleicornis 
frondosa 
Retepora diffusa 
asperatostriata 
Hornera dichotoma 
Fenestella elegans 
tenuicepS 
cribrosa 
Polypora incepla 
Ceramopora imbricala 
incrustans 
foliacea 
Rhinopora tuberculosa 
Lichenalia concentrica 
Sagenella membranaceä 
Dictyonema retiformis 
gracilis 
Inocaulis plumulosa 
Homocrinus. parvuS 
eylindricus 
Glyptaster brachyatus 
Tbysanocrinus liliiformis 
canaliculatus 
aculealus 
Myelodactylus convolutus 
Dendroerinus longidactylus 
Ichthyoerinus laevis Conr. 
Lyriocrinus dactylus 
Lecanocrinus macropelalus 
ornatus 
simplex 
caliculus 
Macrostylocrinus ornalus 
Saccocrinus speciosus 
Eucalyptocrinus decorus (Phill.) 
caelatus 
papulosus 
Stephanoerinus angulatus Conr. 
