THE NATURAL HISTORY SURVEY. 363 



XI. CHICAGO BIBLIOGRAPHY. 



The writer has been able to find but three papers (besides 

 his own) relating to the Mollusca of the area under considera- 

 tion. All available works have been carefully examined. The 

 Chicago drainage area seems to have been but little studied, 

 i. CATALOGUE OF ANIMALS OBSERVED IN COOK COUNTY, ILL. 



Prepared for the Illinois State Agricultural Society by 

 Robert Kennicott, The Grove, West Northfield, 111. (Transac- 

 tions of the Illinois State Agricultural Society, Vol. I, 1853- 

 1854, p. 595.) 



MOLLUSCA. 



Unio alatus Say. Helix monodon Rackett. 



Unio costatus Raf. Helix pro funda. 



Unio iris Raf. Planorbis campanulatus Say. 



Unio bullatus Raf. Planorbis trivolvis Say. 



Uniofragilis Raf. Limncea reflexa Say. 



Unio luteolus Lam. Limncea fragilis Linne. 



Unio dilatatus Raf. Limncea emarginata Say. 



Unio coccineus Hild. Physa heterostropha Say. 



Unio cardium Raf. Paludina decisa Say. 



Unio parvus Barnes. Melania carinata. 



Alasmodonta calceolata Late. Melania semicarinata Say. 

 Cyclas similis Say. 



Of the above, (J. costatus undulatus Barnes; U. iris=ins 

 Lea (?); U. bullatus pustulosus Lea; \3.fragilis=gracilis Barnes; 

 U. dilatatiis=gibbosus Barnes; U. cardium = ventricosus Barnes; 

 A. calceolata calceola\^^-A\ \^. fragilis stagnalis Linne; L.emar- 

 ginata=catascopium Say; M. carinata= semicarinata Say, the 

 latter a species not found in the present territory. The list 

 shows how little was known at that time concerning the varied 

 molluscan fauna of this region. 



2. NOTES ON FRESH-WATER MOLLUSCA FOUND IN THE VICINITY 

 OF CHICAGO, ILL. 



BY W. W. CALKINS. 



Cincinnati Journal of Science, Vol. I, pp. 242-244, 1874. 

 This paper lists the species of fresh-water shells and adds 

 valuable notes on their habits and variability. The following 

 species are listed: 



Limncea reflexa Say. Sphcerium simile Say. 



Limncea zebra* Tryon. Sphcerium partumeium Say. 



Limncea appressa* Say. Sphceriitm transversiim Say. 



