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3 I--. 
Distribution = 1027 : — 
A. Geographical — 
i. General 
ii. Atlantic Ocean, etc. . 
iii. Indian Ocean, etc. . 
iv. Pacific Ocean, etc. . 
V. Arctic Ocean, etc. . 
vi. Antarctic Ocean, etc 
vii. Malaysia . . 
^(vacant). 
D. Geological — 
i. General (vacant). 
ii. Cainozoic — 
(a) General , . . , .... . . 
(b) Pleistocene . . . . . . . . 
(c) Pliocene . . . . . . 
(d) Mioc(3ne . , . . . . . . . . 
(e) Oligocene (vacant). 
(f) Eocene . , ... . . * . . * 
iii. Mesozoic — 
(a) General . . , . . . 
(b) ' Gretaceous (1. Upper; 2. Lower) 
(c) Jurassic (1. Upper (vacant) ; 2. Lower) 
(d) Lias (and Rhaetic) . . . . 
(e) Trias (vacant) 
iv. Palaeozoic — 
(a) General (vacant). 
(b) Permian . . 
(c) Permo-Uarboniferons 
(d) Upper Carboniferous 
(e) Lower Carboniferous 
(f) Devonian 
(g) Silurian 
(1j) Ordovician. , . , • 
(k) Cambrian 
III. Bystematio Index =; 1031 i — 
A. General . . 
B. Holothurioidea . . 
c. Echinoidea . i , . 
D. Asteroidea . . 
li. Ophiuroidea , , 
K. Crinoidea . . 
o. Cystidea and Edrioasteroidea 
n. Blastoidea , .. 
K. Incertae sedis 
(n-13799 m) q 
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b 6-2 
