to his first wife, Nellie, for 30 years. She died in 1924. He married his second wife, Bess, a zoologist and teacher, in 1929. Selected publications Henderson wrote books entitled The Practical Uses of Birds and Economic Mammalogy. His other writings include: Henderson, J. 1905 Extinct Glaciers of Colorado. University of Colorado studies ; v. 3, no. 1:39-44 Henderson, J. 1907. The Mollusca of Colorado. Part I. University of Colorado Studies, Boulder, Colorado 4(2):77-96 + 2 plates. Henderson, J. 1910. Extinct and existing glaciers of Colorado. General series ;, v. 8, no. 1. University of Colorado Studies, Boulder, Colorado Henderson, J. 1912. The Mollusca of Colorado. Part III. University of Colorado Studies, Boulder, Colorado 9(2-3):53-63. Henderson, J. and M.M. Ellis, 1913. The Amphibia and Reptilia of Colorado. Henderson, J. and L. E. Daniels. 1916. Hunting Mollusca in Utah and Idaho. Academy of Natural Sciences of Philadelphia, Proceedings 68:315-339. Henderson, J. 1918. A mollusk hunt in Wyoming. Nautilus 32(2):40-47. Henderson, J. 1919. Some further comments upon the work of Lorenzo Eugene Daniels. Nautilus 32(4):137-138. Henderson, J. 1924. Mollusca of Colorado, Utah, Montana, Idaho and Wyoming. University of Colorado Studies, Boulder, Colorado 13(2):65-223. Henderson, J. 1927. Some South Dakota Mollusca. Nautilus 41(1):19-20. Henderson, J. 1928. Margaritifera vs. Margaritana. Nautilus 41(3):91. Henderson, J. 1929. Some fossil fresh-water Mollusca from Washington and Oregon. Nautilus 42(4):119-123. Henderson, J. 1929. Non-marine Mollusca of Oregon and Washington. University of Colorado Studies, Boulder, Colorado 17(2):47-190. Henderson, J. 1931. Variation in Carinifex newberryi (Lea) and Lymnaea utahensis (Call). Nautilus 44(3):77-79. Henderson, J. 1931. The problem of the Mollusca of Bear Lake and Utah Lake, Idaho-Utah. Nautilus 44(4):109-113. Henderson, J. 1931. Molluscan provinces in the western United States. University of Colorado Studies, Boulder, Colorado 18(4):177-186. Henderson, J. 1934. Some new Mesozoic Mollusca from the Rocky Mountain region and Arizona. Journal of Paleontology 8:259-263, pl. 36. Henderson, J 1935. Fossil non-marine Mollusca of North America. Geological Society of America. Special Paper 3:1-313. In the abstract to this book-length paper, Henderson writes that “in the Rocky Mountain States and the adjacent territory and extending far northward into British America, the non-marine formations are so extensive, of such thickness, and so associated with thick coal beds and other deposits of economic importance, that they are of great consequence to the geologist” but “present more complex and difficult problems than marine deposits generally do, which results in much disagreement as to the age and