Kansas University Science Bolletin. 



Vol. Ill, No. 9. APRIL, 1906. H^rxuffNrg' 



THE UNIONID^ OF KANSAS, Part I. 



AN ILLUSTRATED CATALOGUE OF THE KANSAS UNIONID^l,* 



BY RICHARD E. SCAMMON. 

 With plates LXII to LXXXVL 



INTRODUCTION. 



THIS paper is the first of a series in which the author will 

 attempt to give an account of our present knowledge of 

 the Unionidne, or pearly, fresh-water mussels, of the state of 

 Kansas. 



It was originally intended to embody this material in a 

 single paper, but in the course of the work it has been found 

 advisable to divide it rather arbitrarily into three parts. The 

 first part, as given herein, is an illustrated and descriptive 

 catalogue of the Unios known to occur within the limits of 

 the state ; the second will be a discussion of their geographical 

 distribution ; the third will contain a description of the soft 

 parts of each species. It is a matter of regret that this last 

 cannot be included in the present paper, but as yet the mate- 

 rial at hand is not sufficient to warrant such a report. 



The literature dealing with the Kansas Unionidse is not ex- 

 tensive. Barring a few descriptions of new species f (all of 

 which have turned out to be synonyms) , the only work 

 done on the Kansas Unios is that of Call, which appeared as 

 a series of six reports in the Washburn Laboratory of Natural 

 Science Bulletin, from 1884 to 1887 (4, 5). These reports 

 consist of a list of some forty-nine species, with notes on their 



* Submitted in partial fulfilment of the requirements for the degree of master of arts. 

 tSee bibliography. 



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