10 THE NAUTILUS. 



ISAAC LEA DEPARTMENT. 



[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz Associa- 

 tiou bj- its General Secretary, .Mrs. SI. Burton Williamson.] 



During the first quarter of the year the following new members 

 have been added to the chapter: Mrs. H. A. Zeck, Los Angeles, 

 Cal. ; Mrs. E. H. King, Napa, Cal. ; Mrs. E. A. Lawrence, 2024 E. 

 Second St., Los Angeles, Cal. ; and, in the Juvenile Section, Master 

 James H. Porter, New Wilmington, Pa. The California members 

 will belong to Sections A. and F., the first section "Marine Shells 

 of the West Coast," is under Professor Keep's instruction, and, 

 Section F, " Fossil Shells," is directed by the Hon. Delos Arnold. 



NOTES ON SOME ONTARIO SHELLS. 



[Report of Mr. James H. Lemon. From the Transactions of the Isaac Lea Con- 

 chological Chapter for 1895.] 



During last Summer I was able to do very little work in thecon- 

 chological line, as my time was mostly occupied with botany. This 

 report, therefore, will have to deal with work done in former years. 



As far as I am aware about 147 species of land and fresh water 

 shells have been found in the Province of Ontario, fifty-five species 

 being land shells, and ninety-two fresh water ; but as very few 

 localities in the Province have been diligently searched it is very 

 probable that in the future several more species will be added to 

 the list. Of the 147 species, quite a number are extremely common 

 all over the Province. Others, although widely distributed, are 

 comparatively rare. Others, again are rather plentiful in some 

 parts, but entirely wanting in other parts. Of our rarer species 

 mention might be made of the following: 



Selenites concnva Say. This shell has been found in several parts 

 of the Province of Ontario, but nowhere abundantly. I, myself, 

 have found it in Eastern Ontario, and it is reported from around 

 Ottawa. 



Omji/iii/iiKtfuliyiiiosa Griff'., has been found, as far as I am aware, 

 only near the city of Hamilton, in S. Ontario, and oven there is not 

 a common shell. 



Omplnilinn inornata Say, has been found around Ottawa, but I 

 have not heard of its being taken elsewhere in the Province. 



Gastrodonta ! nterte.rta Binn. This shell has not been found, to my 

 knowledge in Eastern Ontario, but several specimens have been 



