THE UPPER SILURIAN. 77 



One of the most interesting fossils recently found in the Upper 

 Siliuian of Eastern Nova Scotia, is the complete specimen of 

 llomalonotus Dawsoni, Hall, figured here (Fig. 14), and which was 



Fig 14. — llomalonotus Daiosoni. — Hall. Half natural size. 



4 



'! f'~ 



(a) Margin of Segment. 



found on the East River of Pictou by Mr D. Eraser, who has col- 

 lected many of the characteristic fossils of this district while exploring 

 its iron deposits. 



We have to inquire under the next head as to those regions 

 coloured in the map as Upper Silurian, but which subsequent inves- 

 tigations have relegated with some probability to older periods. 



I have said nothing above of the areas of Niagara, Lower lielder- 

 berg, and Oriskany in the western counties, because I have not re- 

 visited them since the publication of my edition of 1868, and have no 

 further facts to present. Farther study of the fossils formerly col- 

 lected lias not materially modified the conclusions stated in Acadian 

 (ieology, pp. 498, 491), and 571 ; but much remains to be done in 

 this district. 



