I goo] Ami — Whittleseya from Nova Scotia. gg 



ON THE OCCURRENCE OF A SPECIES OF WHITTLE- 

 SEYA IN THE RIVERSDALE FORMATION (EO-CAR- 

 BONIFEROUS) OF THE HARRINGTON RIVERALONG 

 THE BOUNDARY LINE BETWEEN COLCHESTER 

 AND CUMBERLAND COUNTIES, NOVA Sc:OTIA, 

 CANADA. 



By H. M. Ami, of the Geological Survey of Canada, Ottawa. 



During- the collecting season of i8g5-6-7-8-g, the writer has 

 spent a portion of his time in making a pal^ontological survey of 

 the various rock-formations in critical localities comprised in the 

 counties of Pictou, Antigonish, Colchester, Cumberland, Hants 

 and King's, in Nova Scotia, for the Geological Survey Depart- 

 ment, with a view of ascertaining the field-relations and succession 

 of the faunas and floras entombed in them and determining^ their 

 position in the column of Pa'asozoic sediments. Much of the work 

 has been in the direction of defining the precise geological horizon 

 of the so-called Devonian rocks of Union and Riversdale as 

 described by Mr. Hugh Fletcher,* which series or formation of 

 rocks also correspond to those described by Dr. R. W. Ells t in 

 his " Report on the geological formations of Eastern Albert and 

 Westmoreland Counties, New Brunswick, and a portion of Cum- 

 berland and Colchester Counties, Nova Scoti.i, embracing the 

 Spring Hill Basin and the Carboniferous System north of the 

 Cobequid Mountains," in which he describes as doubtfully Lower 

 Carboniferous, and probably Devonian, rocks having the same 

 geological relations as those " rocks of Union and Riversdale" 

 referred to above. 



Rocks of this formation in Nova Scotia had been referred by 

 Sir William Dawson to the Carboniferous (Millstone Grit); and 

 my best endeavours were directed to the finding- of evidence to 

 prove the age to which these rock formations were to be referred; 

 whilst in doing- so I have kept constantly in view the discovery of 

 Devonian types. In the summary reports of the Department for 

 the past three years, brief results, as obtained from season to sea- 

 son, have been published, in which it will be seen that 

 the rocks in question are now referred to the Carboniferous 

 System, from the definite and irresistible flood of internal evidence 

 which has accrued and been obtained from them. 



In a paper "On the Sub-divisions of the Carboniferous System 

 in Canada, with special reference to the position of the Union and 



* Annual Rep. Geol. and Nat. Hist. Survey of Canada, Vol. 2, p. 65 P ; 

 1887. Montreal. 



t Annual Rep. Geol. and Nat. Hist. Survey of Canada, Vol. i. p. 51 E. 

 etc. t886. Montreal. 



