1928. Serological examination of the blood-relationship between wild and domestic ducks. Jour. Dept. Agri., Kyushu Imp. Univ., 2:117-132. SIMPSON, G. G. 1944. Tempo and mode in evolution. Columbia Univ. Press, New York, xviii + 237 pp., 36 figs. SUSHKIN, P. P. 1924. [On the Fringillidae and allied groups.] Bull. British Ornith. Club, 45:36-39. 1925. The evening grosbeak (Hesperiphona), the only American genus of a Palaearctic group. Auk, 42:256-261, 2 figs. TORDOFF, H. B. 1954. A systematic study of the avian family Fringillidae, based on the structure of the skull. Univ. Michigan Mus. Zool. Misc. Publ. No. 81:1-42, 77 figs. WETMORE, A. 1951. A revised classification for the birds of the world. Smithsonian Misc. Coll., 117(4):1-22. _Transmitted June 8, 1954._ 25-4632 UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Institutional libraries interested in publications exchange may obtain this series by addressing the Exchange Librarian, University of Kansas Library, Lawrence, Kansas. Copies for individuals, persons working in a particular field of study, may be obtained by addressing instead the Museum of Natural History, University of Kansas, Lawrence, Kansas. There is no provision for sale of this series by the University Library which meets institutional requests, or by the Museum of Natural History which meets the requests of individuals. However, when individuals request copies from the Museum, 25 cents should be included, for each separate number that is 100 pages or more in length, for the purpose of defraying the costs of wrapping and mailing. * An asterisk designates those numbers of which the Museum's supply (not the Library's supply) is exhausted. Numbers published to date, in this series, are as follows: Vol. 1. 1. The pocket gophers (Genus Thomomys) of Utah. By Stephen D. Durrant. Pp. 1-82, 1 figure in text; August 15, 1946. 2. The systematic status of Eumeces pluvialis Cope, and noteworthy records of other amphibians and reptiles from Kansas and Oklahoma. By Hobart M. Smith. Pp. 85-89. August 15, 1946. 3. The tadpoles of Bufo cognatus Say. By Hobart M. Smith. Pp. 93-96, 1 figure in text. August 15, 1946. 4. Hybridization between two species of garter snakes. By Hobart M. Smith. Pp. 97-100. August 15, 1946. 5. Selected records of reptiles and amphibians from Kansas. By John Breukelman and Hobart M. Smith. Pp. 101-112. August 15, 1946. 6. Kyphosis and other variations in soft-shelled turtles. By Hobart M. Smith. Pp. 117-124, 3 figures in text. July 7, 1947.