264 IN MEMORIAM : WALTER PERCY SLADEN, F.L.S., F.G.S., F.Z.S. 
Zoological Station at Naples, where he was much encouraged 
by the lively sympathy of its brilliant head, Dr. Anton Dohrn. 
Diligently he collected the marine fauna of the Mediterranean, 
and perfected his methods of preserving and investigating marine 
organisms, and thus became specially fitted for the post of 
secretar}' of the British Association Committee, and to report 
on the work done at the station. In this year, too, we find 
him, in conjunction with his friend Professor P. Martin Duncan, 
M.B., F.R.S,, publishing the results of his examination of the 
Echinodermata collected by the Arctic expedition 1875-6, fol- 
lowed by further papers on the Echinoderms collected by Captain 
Sir G. S. Nares' expedition to the Polar Seas, and on the Echino- 
derms of the Arctic Sea of West Greenland. 
In 1878 his first paper appeared in the Proceedings of the 
Royal Society for that year. It was on Astrophiura, a new and 
remarkable creature, which in the following year was described 
by him in the Annals and Magazine of Natural History and in 
the Zoologische Anzeiger. In 1878 his first communication to our 
own Journal on the Genus Poteriocrinus and allied forms appeared. 
In 1879 appear papers on the Asteroidea and Echinoidea of the 
Korean Sea, his first Palseontological paper to the Geological 
Society of London on Lepidodiscus Lehouri, and his first report 
for the British Association Committee on the Zoological Station 
at Naples, the precursor of annual reports which extended to 
the year 1898, By this time his exact knowledge as a specialist 
v/as widely recognised, and collections from various quarters 
were placed in his hands for description ; in 1880 he describes 
echinoderms of the Barents Sea, followed by a paper on the 
occurrence of Pediceliaster in the far north, and another paper 
to the Yorkshire Geological and Polytechnic Society, the title 
being " On Traces of Ancient R(;lations in the Structures of the 
Asteroidea." 
The year 1882 was for him of great educational importance 
in relation to his echinodermic researches, for he now made 
a tour of the European Museums, and during his travels he 
found time to correspond with the little fraternity at Halifax. 
