3 
PAGE 
Distribution = 1027 : — 
A. Geographical — 
i. General 
.. 12 
ii. Atlantic Ocean, etc. . . 
. . 
.. 12 
iii. Indian Ocean, etc. . . 
, # 
.. 12 
iv. Pacific Ocean, etc. . . 
, # 
.. 12 
v. Arctic Ocean, etc. . . . . 
• • 
.. 12 
vi, Antarctic Ocean, etc. 
.. 12 
B. Geological— 
i. General 
• • 
.. 12 
ii. Cainozoic — 
(a) General 
. . 12 
(b) Pleistocene 
. . 12 
(c) Pliocene . . 
.. 12 
(d) Miocene . . 
.. 12 
(e) Oligocene 
.. 12 
(f) Eocene . . . . . . » . 
.. 13 
iii. Mesozoic — 
(a) General 
.. 13 
(b) Cretaceous (1. Upper; 2. Lower) 
.. 13 
(c) Jurassic (1. Upper; 2. Lower) .. 
.. 13 
(d) Lias (and Rhaetic) 
(e) Trias . . 
.. 13 
. . 13 
iv. Palaeozoic — 
(a) General (vacant) 
(b) Permian (vacant) 
(c) Permo-Carboniferous (vacant) 
(d) Upper Carboniferous 
(e) Lower Carboniferous 
(f) Devonian . . 
(g) Silurian . . 
(h) Ordovician. . 
(k) Cambrian 
[II. Systematic Index = 1031 : — 
a. General (vacant) 
b. Holothurioidea . . 
c. Echinoidea 
d. Asteroidea 
e. Ophiuroidea 
f. Crinoidea 
g. Oystidea and Edrioasteroidea . . 
h. Blastoidea 
k. Incertae sedis (vacant) 
( n -4840 m) 
13 
13 
13 
13 
13 
13 
13 
13 
18 
22 
23 
24 
24 
b 2—2 
