TABLE OF CONTENTS. 



Page. 



lutvodnction 1 



Description of genera and species 5 



Order Dendroidea 5 



Family Dendrograptida? 5 



Genus Dendrograptns 5 



dawsoui : 6 



dubius ! 7 



frondosus 8 



ramosns .• 8 



praegracillis 9 



spinosus 10 



( ?) problematicns 10 



phainotlieca 11 



ontaroensis 12 



Genus Callograptus 12 



multicaulis ^ 13 



uiagarensis 13 



minutus 14 



minutus altus 15 



strictus 15 



Genus Ptilograptus : 16 



foliaceus 16 



Genus Dictyonema 17 



retiforme 18 



crassibasale ]9 



polyuiorphum 24 



subretiforme 26 



teuellum 28 



stenactinotum 30 



expansum 31 



filiramus 34 



desmoides 34 



percrassus 35 



spenceri 36 



parallelum 37 



Genus Calyptograptus 38 



cyathiformis 38 



micronematodes 39 



(?) radiatus 40 



Subgenus Rhizograptus 40 



bulbosus 41 



V 



