97 



wards. The reef has been of elliptical outline and is now 

 about 300 feet (91 m.) long by 20 feet (6 m.) wide. The 

 main rock mass appears to have been made up of the 

 remains of Diphyphyllum cf. huronicum and small ramose 

 bryozoan remains. Fossil Hill and "The Rock" furnish 

 representatives of the whole Silurian section except the 

 red Cataract shales which are nearly everywhere obscured. 

 Richmond exposures. — Northward from the fossil 

 reef above described and about .4 of a mile south of the 

 school, good exposures of the Richmond may be seen in a 

 field. This horizon contains Stromatocerium and is prob- 

 ably 20 feet (6 m.) below the base of the Cataract dolomite. 

 Some distance northward from this point along the shore of 

 Manitowaning bay, a small water channel has worn its way 

 into the edges of the Richmond limestones and shales. 

 Some rather unsatisfactory exposures of limestone inter- 

 bedded with shale may be seen between the top of the 

 escarpment and the road. The section down to the water's 

 edge consists of 12 feet (3.6 m.) of limestone at the top, 

 underlain by interbedded grey limestone and soft shale. 

 About 21 feet (6.4 m.) above the lake a six foot (1.8 m.) 

 bed of firm limestone outcrops. Fossils are most plentiful 

 in the lower beds, but may be found throughout the section. 

 The talus along the water's edge contains many of the 

 larger fossils, especially the corals. Graptolites occur in 

 a firm, green, limy shale at the water's edge. Fossils 

 found at this locality include: — 



Beatricea undulata Billings. 

 Columnaria alveolata Goldfuss. 

 Streptelasma rusticum Billings. 

 Tetradium fibratum Safford. 

 Rafinesquina sp. 

 Rhynchotrema capax (Conrad). 

 Zygospira kentuckiensis James. 

 Byssonychia radiata (Hall). 

 Orthoceras sp. 



THE KILLARNEY PASSAGE. 



The little village of Killarney, on the north shore of 

 Lake Huron, is a picturesque and interesting point. As 

 the centre of an extensive fishing industry, Killarney enjoys 

 a certain commercial prosperity, while the magnificent 



35066—7 



