Dr. Éva Murai szerk.: Miscellanea Zoologica Hungarica 1. 1982 (Budapest, 1982)
Forró, L.: In memoriam Jenő Daday
his only son at the beginning of the First World War. The death of his son broke his strife, he did not embark on any new projects afterwards. In the spring of 1920 he fell ill, contracted bronchitis and his condition was worsened by asthma that he was suffering from ever since his early youth. He died on the 2nd of April, 1920. DADAY worked with unparalleled diligence; he worked a lot and with great speed. His scientific work of over 40 years were published on over 7 000 printed pages in various Hungarian and foreign journals. Papers containing species lists of just a few pages, as well as monographs several hundred pages long may also be found among his works. He published on over 100 scientific topics, altogether 225 papers and books mark his achievements in Hungarian and various foreign languages + . He studied practically every phylum, ranging from protozoans to mammals. He discovered the following taxa new to science: 3 Buborders, 8 families, 12 subfamilies, 42 genera, 9 subgenera, 801 species and 103 varieties. Apart from systematica, he also published in zoogeography, ecology, and even histology and anatomy. DADAY was asked to study materials housed in several large museums in Europe (e.g. Paris, Berlin, Leningrad) and he was commissioned to report on material collected by several renowned expeditions of his time. It is through his works that new data were obtained on the microfauna of up to then little-known parts of the World, like the Antarctis, Paraguay, Chile, Ceylon, India, Tibet, New Guinea, Asia, German East Africa, the Victoria-Nyanza, the Nile. DADAY' s monograph on Tintinnidae is a significant contribution to protistology. He recorded many species of Nematodes, rotifers and Hydracarina from Hungary and abroad, introducing many new taxa. He wrote Mb thesis on the males of rotifers. DADAY obtained a lot of information about the aquatic microfauna of Hungary, this country was one of the best known areas in this respect that time. He travelled over most of the country during his collecting trips and was one of the participants in writing the fauna catalogue of Hungary in commemoration of the millenary anniversary of the establishment of the Hungarian State. He also took part in the world-renowned Balaton-project. Besides research, DADAY' s contributions are also significant in the field of popularizing science. He was commissioned by Ignác DARÁNYI, minister of agriculture to write a book entitled "A magyarországi tavak halainak természetes tápláléka" (Natural food of fish in Hungarian lakes), which was a summary in popular form of his investigations on the microfauna carried out up to that time. DADAY wrote about 50 popular papers. He wrote with a talented pen, his style was clear, and comprehensive. The great Hungarian writer, Géza GÁRDONYI praised DADAY" a book on the food of fishes for its style. DADAY was officer of the Natural History Society between 1891 and 1918. He was a founding member of the Zoological Section, for which he served as its first notary until 1901. He was editor of Állattani Közlemények for one year. He received several assignments from the Society: he prepared a bibliography of the Hungarian Zoological Literature in two parts (one for the period 1870-1880, and one for 1881-1890). This bibliography contained not only titles and citations, but also short summaries of the papers. He prepared a dictionary of Hungarian entomological names, which appeared In 1894. This is a pioneering work, containing Hungarian and Latin indices. He also prepared an index to the natural history and science periodicals found in various libraries in Budapest. DADAY began his career in a university department, and he occupied a chair at the end of it . When he worked with Géza ENTZ, sen. at Kolozsvár, his attention was directed to the study of aquatic invertebrates, upon the subject he also gave lectures at the university. He also lectured whilst he was with the National Museum. These courses naturally also dealt with the aquatic microfauna. DADAY was also member of the National Commity for Supervision of Secondary School Teachers. DADAY taught applied zoology from 1902 when he received the chair of Zoology in the Budapest Institute of Technology. For two years, between 1909 and 1911 he waB dean of the Faculty of Chemical Engineering. He worked with great enthusiasm in setting up general + The list of DADAY' s publications is given by LUKÁCS (1975). Fig. 1. Portrait of Jenő" Daday with his signature Fig. 2. Jenő Daday in his study in the Hungarian National Museum (From Magyar Salon, 1888, VIII.) Fig. 3. Some slides from the Cladocera material of the Collectio Dadayana
