30 



their forms : and when we again go abroad in our own 

 country and in others we shall look with eyes newly 

 opened and minds alert to the wonders and beauties 

 of this earth of ours. 



LIST OF THE LAND AND FRESH WATER MOL- 

 LUSCA OF TUSCARAWAS COUNTY, OHIO. 



BY DR. V. STERKI, NEW PHILADELPHIA. 



The following list is the result of fifteen years' care- 

 ful collecting. The number of species and forms found 

 is a comparatively large one, especially if the fact is 

 considered that our count3' has no lakes, ponds or ex- 

 tensive swamps. 



This is not the place to enter upon controversies on 

 questions of classification and nomenclature. Where 

 names had to be changed, synonyms are added when 

 desirable to secure the identity of a species. The 

 generic name "Unio" has been retained for convenience. 

 But there are, in fact, several genera well founded by 

 characters of the soft parts, and also the shells. 

 Numbers 105 to 116 will range under Lampsilis, 117 

 to 126 under Quadrula, 127 and 128 under Unio etc., 

 129 and 132 probably fall under different other genera. 



Some species of the genera Anc\'lus, Physa, Am- 

 nicola and Goniobasis need a revision, and a few 

 are, to all probability, new and unpublished. 



Of special interest are, in first order: (No. 76) 

 Planorbis rubellus Sterki. the types of which are from 

 our county; (No. 81) Gundlachia, the occurence of 

 which, in this vicinity, is of highest interest; (No. 128) 

 Unio complanatus Sol., here for the first time found in 

 the Ohio drainage, as to the writer's knowledge. 



Mention may be made also of four well confirmed 

 species of Pisidium the types of which were detected 



