Notes on the Albany Meeting. 475 



Geological Survey, as published on this subject, together 

 with important notes by Mr. A. Smith Woodward and 

 Dr. Henry Woodward of the British Museum on some of 

 the fossils discussed will be embodied in the paper." Thg 

 word Knoyclart is pronounced as if spelt Krodiart. 



In the discussion following this paper Profs, C. D. 

 Walcott, H. S. Williams, K S. Shaler and W. M. Davis 

 took part. 



Eegardin^ the relations of this Eo-Devonian formation 

 and the underlying series of Silurian strata at Arisaig, the 

 writer was induced to make a preliminary statement in 

 the course of the discussion as to the four divisions into 

 which he is for the present classing the Silurian formations 

 of Antigonish County adjacent to the strata of the Knoy- 

 dart formation. These are in descending order as fol- 

 lows : — 



IV. The Stonehouse Formation. Consisting of red 

 shales and mudstones, holding an abundant lamellibrachi- 

 ate fauna with Grammysia Acadica, Billings as an horizon 

 marker, also interstratified bands of limestone holding 

 trilobites, ganterogoda- and brachiopoda. This is the 

 formation called " Lower Helderberg " by Mr. H. Fletcher 

 and other geologists. Neither the fauna nor the character 

 of the strata warrant the correlation of this formation 

 with the Lower Helderberg. In character, it more 

 closely resembles the Ludlow of England than any other 

 series of strata. 



III. The Moydart Formation. Consisting of light 

 greyish-green fine grained and heavier bedded siliceous 

 limestones, holding brachiopoda, gasteropoda, etc. 



II. The Mc Adam Formation. Consisting of deep gray 

 or black impure shale and mudstones, holding a lamelli- 

 brachiate and graptolitic fauna, with here and there an 

 intercalated lenticular sheet or bed of limestone with 

 brachiopoda in abundance. 



I. The Arisaig Formation. Consisting for the most 



