282 C. SCHUCHERT MEDINA AND CATARACT FORMATIONS 



XArenicolites sparsus Salter. These are paired holes seen in many for- 

 mations; therefore of no stratigraphic and but little biologic value. 

 Nicholson identifies this European species at Dundas. 



XPlanolites vulgaris Nicholson. Originals from Dundas. 



Hydeoidea : 



b-\-Clathrodictyon vesiculosum Nicholson. Rare in Manitoulin member. 

 (See Parks, Univ. Toronto Studies, Geol. Ser., 5, 1908, p. 14.) 



XRetioUtes venosus Spencer, not Hall. The writer can not make out 

 what Spencer figures, but it is certain that he has no graptolite and 

 certainly not the characteristic form of the Clinton. 



XJyictyonema. At least two species occur in the Manitoulin member at 

 Forks of Credit River. 

 Corals: 



-\-Zaphretxt\^ l)ilaterali8 (Hall). Originally described from the Clinton 

 and higher beds. Common in Manitoulin member. 



-^-Ealysites microporus (Whitfield). Always rare. In Manitoulin mem- 

 ber at Manitowaning and elsewhere. 



•\-EeUolites ifiterstinctus (Linnaeus). Rare in southern localities, but 

 common in Manitoulin member at Manitowaning. 



h-\-DiphyphyUum ccespitosum (Hall) ? Manitoulin member, Manitowan- 

 ing. 



*DiphyphyUutn vennori (Billings). Originals from the Manitoulin mem- 

 ber at Manitowaning. A good species. 



b*Acervulariu (?) gracilis (Billings). Originals from Manitowaning, 

 where it is common (Stromhodes gracilis). Manitoulin member. In 

 the Brassfield of Ohio is the related A. (f) cUntonensis Nicholson. 



b-\-Favo»ites venustus (Hall). Common in Manitoulin member at Mani- 

 towaning. 

 Stabfishes : 



*Mesopal<easter granti (Si)encer). Originals from the Cabots Head mem- 

 ber at Hamilton. 



*M€Sopal€ea8ter (?) cataractensis Schuchert. Originals from the Cabots 

 Head member at Hamilton. 

 TuBicoLous Annelida: 



h*Comulites di-stans (Hall). Originally described from the "Niagara 

 group" at Flamborough Head, but is from the Manitoulin member of 

 the Cataract. Nicholson also notes it from Dundas. 



*ComuUtes neglectus (Nicholson and Hinde). Originals from Dundas. 

 Probably Manitoulin member. 

 Errant Annelida: 



♦At Dundas, Hinde got and described from the Cataract the following 

 teeth: Eunicites clintonejisis, E. coronatus, E. chiromorphus, (Enonites 

 amplus, CE. fragilis, Aralellites elegans, Lumhriconerites hasalis, L. 

 trianguJ/iris, L. armatus, and Glycerites caJceolus. 

 Bryozoa : 



-\-Eelopora fragilis HalL Originally described from the Clinton of New 

 York and the "Clinton" of Flamborough Head, Ontario. Distributed 

 throughout the two upper members of the Cataract 



