xxxii The Molluscan Family Planorbidae 



262. On the division of the Sphaeriidae into two subfamilies; and the description of 



a new species and genus of Unionidae, with descriptions of new varieties. 

 Amer. Midi. Nat., 10(7) :220-223. 



263. Descriptions of new forms of Pleistocene land mollusks from Illinois, with remarks 



on other species. Nautilus, 40:114-120. 



264. Molluscan associations of White Lake, Michigan ; a study of a small inland lake 



from an ecological and systematic viewpoint. Ecology, 8(3) : 353-370. 



265. A new variety of Helisoma campanulata from Michigan. Nautilus, 41:49-51. 



266. Report of curator, Museum of Natural Historv. In 'President's Report,' Uni- 



versity of Illinois, 1926-1927:129-132. 



1928 



267. Descriptions of new varieties of land and fresh-water mollusks from Pleistocene 



deposits in Illinois. Nautilus, 41:132-137. 



268. The American Bythinia not whollv an introduced species. Trans. Illinois State 



Acad, of Sci., 20:56-63. 



269. Molluscan life of the loess deposits of Illinois. Op. cit., 20:269-292. 



270. Influence of a changed en\-ironment in the formation of new species and varieties. 



Ecology, 9:271-283. 



271. The fresh-water Mollusca of Wisconsin. Part I. Gastropoda. Wisconsin Acad. 



Sci., Arts, and Lett., 1928 :i-xx -f 507 pages. 



272. The fresh-water Mollusca of Wisconsin. Part II. Pelecypoda. Bull. Univ. Wis- 



consin, 1527: vi + 495 pages. 



273. The Mollusca of Chautauqua Lake, New York, with descriptions of a new variety 



of Ptychohranchus and of Helkoma. Nautilus, 42:48-60. 



274. Report of curator. Museum of Natural History. In 'President's Report,' Uni- 



versity of Illinois, 1927-1928:124-127. 



1929 



275. Fossaria perplexa F. C. Baker and Junius Henderson. Nautilus, 42:103-104. 



276. Certain anatomical features of the fresh-water mollusc, Helisoma corpulenta Say. 



Trans. Amer. Micros. Soc, 48(1) :44-47. 



277. Vermont shells. Nautilus, 41:108. 



278. Mollusca from Vermilion and Pelican Lakes, Minnesota, with the description of a 



new variety of Helisoma corpulenta. Op. cit., 42:95-97; 131-136. 



279. A study of the Pleistocene Mollusca collected in 1927 from deposits in Fulton 



County, Illinois. Trans. Illinois State Acad. Sci., 21 :288-312. 



280. The use of molluscan shells by the Cahokia mound builders. The Cahokia 



Mounds, Bull. Univ. Illinois, 26(4) : 147-154. 



281. Stagnicola couleensis F. C. Baker. In Henderson, 'Some Fresh-water Mollusca 



from Washington and Oregon,' Nautilus, 41:118-120. 



282. The European starling in Illinois. Science, 69:521-522. 



283. Report of curator. Museum of Natural History. In 'President's Report,' Univer- 



sity of Illinois, 1928-1929:140-146. 



1930 



284. A new record of Castoroicles ohioensis from Illinois. Science, 71:389. 



285. On genus and species making. Op. cit., 72:37-39. 



285a. University museum exhibition cases. Museum News, 7(19):11-12. 



286. The use of animal life bv the mound-building Indians of Illinois. Trans. Illinois 



State Acad. Sci., 22:41-64. 



287. The molluscan fauna of the southern part of Lake Michigan and its relationship 



to old Glacial Lake Chicago. Op. cit., 22:186-194. 



288. A review of our present knowledge concerning the character and distribution of 



the Pleistocene aquatic molluscan life of Illinois. Op. cit., 22:411-434. 



289. Influence of the glacial period in changing the character of the molluscan fauna 



of North America. Ecology, 11(3) :469-480. 



290. The variation of molluscan life during the Pleistocene and recent time. Nautilus, 



44(l):21-24. 



291. Notes on Professor Shimek's paper on land snails as indicators of Ecological 



conditions. Ecology, 11(4) : 788-789. 



292. Report of curator. Museum of Natural History. In 'President's Report,' Univer- 



sity of Illinois, 1929-1930:164-169. 



