74 Trans Acad. Sci. of St. Louis. 



Section 9. Charlotte and Summerville, Lake Ontario. 

 These two places are situated on opposite sides of the 

 mouth of the Genesee River, which is extended far into the 

 lake by means of two long piers or docks. The water is 

 shallow for a considerable distance and shells are brought by 

 thousands over this area and deposited in long ridges of sea- 

 wrack along the beach. This was an excellent place to find a 

 large number of species. July 21. Weather fine and warm. 



Station 10. South Park, Genesee River, near bridge. 

 Water shallow, shore lined with rocks. Bottom sandy and 

 muddy. Weather very fine; temperature 80°. Mollusks 

 very common. July 22. 



Station 11. New York State Fish Hatcheries, Caledonia. 

 Grove with dead and fallen logs and numerous stones. Mol- 

 lusks plentiful under boards. Stream running from fish tanks 

 in which both Limnaea and Planorbis were found. July 23. 

 Occasional rains. Temperature about 80°. 



Station 12. Creek near Kelly's Grove. Clear and rapid. 

 Stony bottom. Very few mollusks. July 23. 



Station 13. Cobb's Hill. A part of the esker known as 

 the Pinnacle Hills, from 75 to 125 feet in height. Heavily 

 wooded on north side where there are several ravines. Oak 

 and elm trees predominate. Ground moist and covered with 

 the usual forest debris. July 27. Very rainy. Temperature 

 70° with a very strong wind. 



Station 14. Field near canal just out of Rochester. Pupa 

 and small Limax found under chips and sticks, and about old 

 stumps. Rainy and rather cool. 



Station 15. Canal below lock no. 65. Shore lined with flags 

 and other water plants. July 28. Rainy. 



Station 16. Long Point, Conesus Lake, in ravine. July 1, 

 1891. Collected by Miss Grace M. Hall. 



Station 17. Owasco Lake, Cayuga County. Collected by 

 Dr. Howard N. Lyon. 



Station 18. Medina. 



Station 19. Canandaigua Lake. 



The last two stations are represented only by specimens in 

 the collection of the Chicago Academy of Sciences. 



