145 



Cox, E. T., State Geologist. Geological .Survey of Indiana. Annual Re- 

 port for 1875. 



This volume coutains a paper by G. M. Levette, entitled, " 01>servatioiis on the Depth 

 and Temperature of some of the Lakes of Northern Indiana." There is given in 

 the paper a list of fifteen Unios, one Margaritana, four Anodons and nineteen species 

 and varieties of fresh water univalves. The list, except the portion pertaining to 

 the Unlonidx, was prepared hy Mr. John W. Brykit, of Indianapolis. It is intended 

 to cover only northern Indiana. 

 Stein, Fred. Geological Survey of Indiana. Annual report for the year 

 1880. Pp. 451-467. Contains the molluscous fauna of Indiana. 

 There are listed the Unioncs, Margaritanas, Anodontas, and other fresh water bivalves, 

 of several genera and species. Besides these there are given the genera and species 

 of freshwater univalves, and all the known species and varieties of land shells. 

 This list hears the distinction of being the very first to endeavor to present a com- 

 plete view of the shell-life Indiana. 



Species described from Indiana. 

 In collating the lists of mollusks known from this state it has been 

 matter of great interest to note those which had an original habitat as- 

 cribed to some part of Indiana. This was to be expected, perhaps, since 

 the earliest of the best known and most scientific writers in conchology, 

 Thomas Say, was for a long time a resident of that interesting colony — the 

 basal principle of which was a kind of Utopian doctrine of commun- 

 ism — which founded New Harmony. While resident here, under the in- 

 spiration of association with such men as Troost, Maclure, and the older 

 Owen, opportunity was afforded Say to collect and examine very many of 

 the mollusks of the region. He improved the occasion, as we well know, 

 and gave to the world of science its best early American contributions to 

 conchology. Since his day other species have been found, supposed to be 

 new and described as such by various authors until the list has grown to 

 very respectable proportions. While some of the names following are 

 properly recognized as syononyms yet they are given with the reference 

 to the forms which have priority, for it is but fair to the workers of 

 other days that we recognize the disadvantages of long distance from 

 scientific centers and the other untoward conditions of life in a practical 

 wilderness. 



LAND SHELLS. 



Helicina occulta Say. Near New Harmony. 

 SucciNEA VERMETA Say. Ncw Harmony. 

 PoLYGYRA FASTKiiATA Say. Ncw Plarmony. 

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