IN MEMORIAM : WALTER PERCY SLADEX, F.L.S., F.G.S., F.Z.S. 265 
In reply to an expression of regret at his absence from one of 
its proposed gatherings, and a hope that he might be present in 
spirit (!) he sympathetically replied, enclosing one of his inimitable 
comic pen and ink sketches, displaying himself and each member 
of the Club preserved in jars of spirit, and each characteristically 
labelled with a suitable droll name of his own invention. 
His European visit yielded him a wealth of material and 
copious notes and drawings, to be in part at least worked up in 
his memoir of the Asteroidea of H.M.S. " Challenger " expedition. 
The year of his foreign tour saw the publication of his description 
of the Asteroidea dredged during the course of the " Knight 
Errant,'' as well as the first part of his monograph of the Fossil 
Echinoidea, which was extended in four more yearly parts, and 
published in conjunction with his friend Dr. Duncan, in the 
Palaeontographical Society's Volumes, 1881-1885. 
To the grief of the Halifax circle, in 1883 Sladen left to 
reside at Ewell, near London. This nearness to the great heart 
of intellectual activity proved of great advantage to him bv 
bringing him into more direct intercourse with the leaders of 
scientific thought, among whom he soon made some stimulating 
and lasting friendships. 
Again we find collections committed to him for description, 
this time from the Faroe Channel. In the words of Professor 
Howes, " these reports mostly deal with whole collections, and 
include reports on tliose made in the Arctic Region in 1875-1876, 
on those of the 'Alert,' 'Knight Errant,' and 'Triton,' as also 
those made in the Faroe Channel, the Korean Sea, and the Mergui 
Archipelago. In each Sladen produced good results, as in the 
discovery of genera such as Jlicraster and Rhegaster ; and what 
more natural, therefore, than that he should have been entrusted 
with the working out of the Asteroidea collected by H.M.S. 
' Challenger,' the report upon which was the crowning achieve- 
ment of his life." 
During the next ten years he produced the chief work of 
his life : paper follows paper, each exhibiting trained powers, 
careful work, and original thought. In 1883 he contributed to 
