3 
Distribution = 1027 : — 
A. Geographical — 
i. General (vacant). 
ii. Atlantic Ocean, etc. . . 
iii. Indian Ocean, etc. . . 
iv. Pacific Ocean, etc. 
v. Arctic Ocean, etc. . . 
vi. Antarctic Ocean, etc. 
vii. Malaysia 
B. Geological — 
i. General 
ii. Cainozoic — 
(a) General 
(b) Pleistocene 
(c) Pliocene 
(d) Miocene . . 
(e) Oligocene 
(f) Eocene 
iii. Mesozoic — 
(a) General 
(b) Cretaceous (1. Upper; 2. Lower) 
(c) Jurassic (1. Upper ; 2. Lower) . . 
(d) Lias (and Rhaetic) 
(e) Trias . . 
iv. Palaeozoic — 
(a) General (vacant). 
(b) Permian 
(c) Permo-Carboniferous 
(d) Upper Carboniferous 
(e) Lower Carboniferous 
(f) Devonian . . 
(g) Silurian 
(h) Ordovician. . 
(k) Cambrian . . 
III. Systematic Index = 1031 - 
A. General 
b. Holothurioidea 
c. Echinoidea 
d. Asteroidea 
e. Ophiuroidea 
f. Crinoidea 
o. Cystidea and Edrioasteroidea . . 
ii. Blastoidea 
k. Incertae sedis (vacaut). 
PAGE 
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.. 32 
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If 
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(n-13246 m) q 
b 5—2 
