LINNEA-N SOCIETY OF LONDON. 45 



The whole of the Euphorbiaceae in DC. ' Prodrotnus ' were 

 worked up by him, exclusive of the typical genus, which was elabo- 

 rated by Boissier. By this effort his name stands next to the two 

 DeCandolles, with 1144 pages, or 11 more than those contributed 

 by Mr. Bentham. The peculiar usage of authorities in this 

 volume was strongly censured at the time, and has never been 

 followed by any author of note; it may briefly be described as 

 ascribing the species to that author whose circumscription of it 

 agrees with the views held by the monographer: frequently 

 Linnean species are claimed as of "Muell. Arg." because the ori- 

 ginal species has been dismembered, and the fragment left was not 

 considered as validly representing the Linnean idea. Naturally 

 every new species in an old genus may modify the first descrip- 

 tion of it ; but new light cannot be held to blot out the fiict that 

 the elder authors had established their genera and species on 

 data sufficient for their time. 



To his pen are also due the enumeration of the Brazilian 

 Euphorbiaceae and part of the E-ubiacese : the latter in 1881, and 

 marking the last phanerogamic publication he wrote. Eor more 

 than forty years before his death he had interested himself in 

 cryptogamic plants, and these gradually came to claim his atten- 

 tion to the relinquishment of other branches. Concentrating 

 his attention mainly on Lichens, he published more than a hundred 

 memoirs on them ; one series running for seventeen years under 

 the title of " Lichenologisehe Beitrage " in ' Flora.' Each para- 

 graph being numbered, he was accustomed to refer to it simply 

 as " L. B. n. 1006," and so on ; causing much annoyance and 

 trouble to those who come after him. In the papers which he 

 communicated, through Fellows of the Linnean Society, to our 

 publications, this pLm of citation was invariably adopted ; but 

 the full citation direct to the volume and page was supplied by 

 the Oificers of the Society before the papers were issued. 



Dr. Mueller married in 1858 ; and in 1879 had the great grief 

 of losing his only son, a promising youth of 19. 



On 3rd May, 1891, he was elected one of our Foreio'n 

 Members ; after a short illness he died, 20th January, 1896, 

 aged 68. 



His phanerogamic herbarium has long been in Ziirich, whilst 

 his lichen-herbarium and MSS. were acquired about a dozen years 

 ago by M. Barbey, on condition that Mueller should have full 

 use of them during his life. A careful bibliography of the works 

 published by Dr. Mueller will be found in the ' Bulletin de 

 I'Rerbier Boissier,' iv. (1896) pp. 127-133, i)receded by a sympa- 

 thetic notice from the pen of M. John Briquet. 



Henry Seebohm was born at Bradford in Yorkshire in 1832, and 

 edticated at the Quakers' School in York. His early life was 

 spent in various business occupations ; and he finally settled 

 down as a member of a leading firm of Pot-Steel Manufacturers 



