MARINE BIOLOGICAL STATION AT PORT ERIN. ao 
_ great historic interest. In that preliminary account of the 
Oceanic Deposits we find Murray’s first classification into 
(1) Shore deposits, (2) Globigerina ooze, (3) Radiolarian ooze, 
(4) Diatomaceous ooze, and (5) Red and Grey Clays, which has 
_ been adopted with little or no change in all succeeding works ; 
_ and, in his report on the surface organisms, we find the first 
figures of the living Hastigerina, Pyrocystis and the remarkable 
deep-water Radiolaria known as “ Challengeride.”’ 
Kach of the three main lines of investigation—deposits, 
_ plankton and coral reefs—which Murray undertook on board 
the “Challenger ’’ has been most fruitful of results both in his 
own hands and those of others. His plankton work has led on 
to those modern planktonic researches which are closely bound 
_ up with the scientific investigation of our sea-fisheries. His ob- 
_ servations on coral reefs, in conjunction with the “Challenger” 
results as to depths of the ocean and the presence of submarine 
volcanic elevations, resulted in his new and most original theory 
as to the formation of “ Atolls,’ which removed certain diffi- 
culties that had long been felt by zoologists and geologists alike 
to stand in the way of the universal acceptance of Darwin’s 
well-known theory of coral reefs and islands. 
His work on the deposits accumulating on the floor of the 
ocean resulted, after years of study in the laboratory as well 
as in the field, in collaboration with the Abbé Renard of the 
Brussels Museum, afterwards Professor at Ghent, in the pro- 
duction of the monumental ‘“ Deep-Sea Deposits”? volume, 
one of the “Challenger’’ Reports, which first revealed to 
the scientific world the detailed nature and distribution of the 
varied submarine deposits of the globe and their relation to 
the rocks forming the crust of the earth. 
These studies led, moreover, to one of the romances of 
Science which deeply influenced Murray’s future life and 
work. In accumulating material from all parts of the world 
and all deep-sea exploring expeditions for comparison with 
