Notes, Reviews and Comments. 109 



lakes. Transient characters of fresh-water lakes in general. Questions 

 as to the effects of dredging channels in outlets, also as to rain-fall and 

 evaporation in effecting the levels. Present and future effects of the 

 low water effects on navigation and commerce. Means of relief. 

 Experiments in damming lakes. Possibility and advantage of damming 

 the outlets of some of the great lakes. Conclusions. 



Geracus Tubifer. A Nezu Thysanuran of the Little River Group, 

 St. John, N.B. By G. F. Matthew, D. Sc. 



This anomalous insect is referred to the Thysanurans because the 

 joints of the thorax are separated, and there are" no wings, and because 

 of the uniformity of adjoining somites. The head is reduced to a small 

 conical projection, terminating in a prolonged tube or proboscis. 

 Apparently the nearest ally is a tube-bearing, few-jointed (aquatic ?) 

 insect found by Dr. S. H. Scudder in the Oligocene beds of Florissant, 

 which he has referred to the Thysanurans. The reduction of the head 

 to little else than a sucking tube is not easily paralleled among these 

 lower msects, and gives the head somewhat the appearance of that of 

 a weevil. The fossil is from a bed which has already yielded a large 

 number of insect remains. 



Coal Mining in Pictou County, N.S. By E. Gilpin, Jr., LL.D. 



The paper gives the principal facts in connection with the pioneer 

 workings carried on by the Grand Mining Association in this county, 

 the dates of the various finds, workings, railway construction, etc. 



On the Sequence of Strata Comprised in the South-west quarter- 

 sheet Map of the Easter7i Townships of the Province of 

 Quebec, and their palceontological relations. By Henry M. 

 Ami, M.A., F.G.S., of the Geological Survey of Canada. 

 Communicated by Dr. R. W. Ells, F.R.S.C. 



The recent investigations of Dr. Ells, of the Canadian Geological 

 Survey, in the " South-west Quarter-sheet Map of the Eastern Town- 

 ships of the Province of Quebec," serve to throw a great deal of new 

 light upon the various problems involved in that district on which so 

 much has already been written. As the strata in question are highly 

 fossiliferous, and the numerous fossils collected serve as excellent 

 material with which to ascertain the sequence and age of the strata in 

 these disturbed regions, the results thus far obtained will be discussed 

 and the various faunas and zones indicated. 



