THE LATE W. S. DALLAS, P.L.S. 209 



collected in one volume entitled 'A Natural History of the 

 Animal Kingdom,' and published in 1856. 



His 'Elements of Entomology,' published by Van Voorst in 

 1857, an octavo volume of more than 400 pages, was a work of 

 considerable utility at the date of its appearance, and showed 

 how untiring was the author's zeal in pursuit of his hobby. 



As a translator he was equally industrious, and English 

 zoologists are indebted to him for the following useful transla- 

 tions : — Von Siebold's work on ' Parthenogenesis in Moths and 

 Bees,' 1857 ; vol. v. of Humboldt's ' Cosmos,' for Bonn's Scientific 

 Series, 1858; Nitzsch's ' Pterylography,' for the Kay Society, 

 1867; Fritz Muller's 'Facts and Arguments for Darwin,' 

 1869; Prof. Heer's 'Primeval World of Switzerland,' 1876; and 

 Buchner's ' Man, Past and Present.' In addition, he translated 

 numerous foreign articles for the ' Annals and Magazine of 

 Natural History,' the ' Chemical Gazette,' ' Philosophical Maga- 

 zine,' and other periodicals, to which he also occasionally found 

 time to contribute original papers of his own. 



His early work at the British Museum helped to qualify him 

 for the Curatorship of the Yorkshire Philosophical Society's 

 Museum, in York, to which post he was appointed in 1858, on 

 the resignation of Mr. Edward Charlesworth. Here he remained 

 until 1868, when, on the retirement of Mr. H. M. Jenkins, he 

 succeeded him as Assistant Secretary and Librarian to the 

 Geological Society of London, a position which he held with 

 great credit to himself and advantage to the Society until his 

 death. From the date of his appointment he appeared to work 

 harder than ever, having to edit the Quarterly Journal of the 

 Geological Society, and his leisure hours, after the official work 

 of the day was ended, were fully occupied. Between the years 

 1877 and 1883, he materially assisted Prof. Martin Duncan in 

 editing Cassell's ' Natural History ' (six vols. 4to), to which he 

 contributed the articles Chiroptera, Insectivora, Rodentia, 

 Hymenoptera, Neuroptera, Diptera, Aphaniptera, Rhynchota, 

 Orthoptera, Thysanura, Myriopoda, and Arachnida. He was 

 one of the Editors of the 'Annals and Magazine of Natural 

 History' from 1868 to 1890, and from 1877 to 1880 edited the 

 ' Popular Science Review.' 



He was elected a Fellow of the Linnean Society in 1849, and 

 for a long time took an active interest in its proceedings, serving 



