6 PROCEEDINGS OF THE WASHINGTON MEETING 



tion E in 1890 and vice-president in 1894) ; the Geological Society of 

 America (councillor, second vice-president, first vice-president, and presi- 

 dent in 1908) ; the Paleontological Society of x\merica; the National 

 Geographic Society; the Iowa Academy of Sciences (president in 1908), 

 and the Davenport Academy of Sciences. He also served as a meml^er of 

 the National Advisor}^ Board on Fuels and Structural ^laterials, and as 

 a member of the White House Conference on Conservation of Natural 

 Eesources in 1908. 



Professor Calvin's work, like his experience, was varied. His scientific 

 activity may be judged somewhat by the bibliography which follows. He 

 himself looked on his later studies of the mammalian fossils from the 

 Aftonian as the most important of his life. His work on the glacial 

 sheets in Iowa, particularly the lowan, was especially valuable, and the 

 results appear throughout his later papers. He had undertaken a more 

 thorough study of the lowan border, and there is added tragedy in the 

 death which stilled the master mind, so well equipped to cope with this 

 important problem, before this work was completed. His paleontological 

 work extended over many years and was carried on primarily for the 

 benefit of his students. He described and named a number of fossils, but 

 many more were in his possession awaiting attention. The following list 

 includes the species which he described : 



List of Fossils Described by Prof. Samuel Calvin *■ 

 coelentera i 



PhilUpsastrea Mllingsi Calvin. American Geologist, vol. xii, 1893, p. 111. 

 Vermes : 



Streptindytes, a new genus. American Geologist, vol. i. 1888, p. 27. 



Streptindytes acemdaria Calvin. American Geologist, vol. i, 1888, p. 27. 

 Molluscoidea : 



Rhi/nchancUa alta Calvin. (Described in a private paper.) circa 1875. 



Rhi/nchonella amhigua Calvin. Bulletin of the U. S. Geological and Geo- 

 graphical Survey of Territories, vol. iv. no. 3, 1878, p. 720. 



Spirit er machridei Calvin. American Journal of Science, vol. xxv, 1883, 

 p. 433. footnote. 



Spirifcr urhatnif^ Calvin. Bulletin from the Laboratories of Natural His- 

 tory of the State Uuiversitj- of Iowa, vol. i, no. 1, 1889, p. 28. 



Orthis infera Calvin. Bulletin of the U. S. Geological and Geographical 

 Survey of Territories, vol. iv, no. 3. 1878, p. 728. 



Gypidula munda Calvin. Ibid., p. 730. 



Strophcodonta rariaMlis Calvin. Ibid., p. 727. 



Stropheodouta quadrata Calvin. Synonym for -!«?. coJrini Miller. The 

 original description by I»rofessor Calvin is in Bulletin of the V. S. Geo- 

 logical and Geographical Survey of the Territories, vol. iv, no. 3, 1878, 

 p. 728. 



iThe greater part of this and the following list of fossils w^s prepared by Prof. A, 0, 

 Thomas, 



