THE NAUTILUS. 79 



destroyed the custom house of Portland, Maine, 1854, together 

 with all of Dr. Mighels' specimens. 



In the summer of 1842 Alexander Longfellow, assisting in 

 the Boundary Survey, collected in Second Eagle Lake, North 

 lat. 47, four specimens of Lymncea ampla together with Physa 

 andllaria. This lake is also located on the east branch of Fish 

 River and is at this time known under the name of Square 

 Lake. The specimens collected by Mr. Longfellow and illus- 

 trated and published by Dr. Mighels in Boston Journal Natural 

 History, Vol. 4, page 347, pi. 16, came from Square Lake inlet. 

 The great trouble to all workers in natural history is the many 

 changes in the names of places. This might have been avoided 

 if the map makers had not made it their business to change 

 names on every new edition. Specialists and makers of new 

 species in every new edition of their works are changing the 

 names of the species described, each calling them Scientifically 

 Correct. What to-day (1920) is called Fish River lakes was 

 called in 1860 Eagle Lakes; what is now Eagle Lake was called 

 Lake Winthrop in 1860. Square Lake of to-day had the name 

 of Lake Sedgwick in 1860, and was known as Second Eagle 

 Lake in 1842. Cross Lake of to-day bore the name of Lake 

 Preble in 1860, and Long Lake was Cleveland Lake in 1860. 

 The French settlers that live in the vicinity of the Fish River 

 Lakes are still using the old names. 



Lymncsa emarginata Say and L. ampla Mighels have also 

 undergone several changes during this period of 100 years, as 

 the following list shows: 



Lymnaus emarginatus Say, 1821. 



Limnea emarginata Haldeman, 1842. 



Galba emarginata Baker, 1911. 



Limncea ampla Mighels, 1843. 



Radix ampla Morse, 1864. 



Lymnsea mighelsi Binney, 1865. 



Lymnsea (Radix) mighelsi Dall, 1905. 



Limnsea emarginata var. mighelsi Ny lander, 1901. 



Galba emarginata mighelsi Baker, 1911. 



What will it be one hundred years from now ? I have some 



