1430 
THE VOYAGE OF H.M.S. CHALLENGER. 
TABLE I. 
Shoicing the Bathymetrical DUtrihution of the Bottom-living Species (Benthos) taken hy the 
Trawl and Dredge on hoard H.M.S. Challenger. 
Zone. 
Nuniber of Stations. 
Number of S{>cciniens. 
N umber of Species. 
Number of Genera. 
Number of Species 
believed to have come 
from the Bottom. 
Number of Genera 
believed to have come 
from the Bottom. 
Number of New Species 
from the Bottom. 
Number of New Genera 
from the Bottom. 
Number of Species 
taken only in the 
Zone referred to. 
Numi)er of New Species 
taken only in the Zone 
referred to. 
N umber of Species taken 
also in other Zones. 
Number of Species taken 
also in the Zone of over 
2500 fathoms. 
Number of Species taken 
also in the Zone between 
2000 and 2500 fathoms. 
Number of Species taken 
also in the Zone between 
1500 and 2000 fathoms. 
Number of Species taken 
also in the Zone between 
1000 and 1500 fathoms. 
Number of Species taken 
also in the Zone between 
500 and 1000 fathoms. 
Number of Species taken 
also in the Zone between 
100 and 500 fathoms. 
Number of Species taken 
also in the Zone under 
100 fathoms. 
i Over 1 
; 2500 V 
; fathomv 1 
25 
600 
235 
200 
153 
119 
137 
49 
95 
84 
58 
26 
33 
21 
13 
10 
5 
2000 to ) 
2500 J. 
fathoms } 
32 
820 
340 
250 
247 
172 
229 
76 
161 
150 
86 
26 
46 
38 
14 
20 
7 
1 1500 to \ 
2000 V 
fathoms ; 
32 
1250 
600 
345 
394 
256 
335 
96 
242 
206 
152 
33 
46 
78 
24 
48 
14 
1000 to ^ 
1500 1 
fathoms } 
25 
2000 
600 
400 
493 
313 
358 
79 
270 
201 
223 
21 
38 
78 
69 
99 
32 
500 t o \ 
1000 V 
fathoms ) 
23 
2000 
710 
425 
616 
352 
493 
92 
400 
348 
216 
13 
14 
24 
69 
143 
49 
100 to 1 
500 \ 
fathoms ) 
40 
6000 
2050 
865 
1887 
771 
1293 
166 
1407 
1024 
480 
10 
20 
48 
99 
143 
285 
Under \ 
100 1 
fathoms } 
70 
4400^1500 
4248 
14-38 
1525 
130 
3898 
1382 
350 
5 
7 
14 
32 
49 
285 
TABLE II. 
Showing the Geographical Distribution of the Bottom-living Species (Benthos) taken hy the 
Trawl and Dredge on hoard H.M.S. Challenger. 
Total Number 
Number of 
Number of 
Number of 
Number of 
Number of 
Number of 
Number of 
Zone. 
Species 
Species 
Species 
Species 
Species 
Species 
Species 
living Species. 
taken 
8. 
taken 
T. 
taken 
N. 
common 
STN. 
common 
SN. 
common 
ST. 
common 
TN. 
Over 2500 1 
btbumi f 
153 
85 
S6% 
55 
36 % 
72 
47% 
14 
9% 
8 
5% 
5 
3 % 
6 
4% 
20n0to2500) 
fathomii 1 
247 
129 
120 
98 
19 
9 
20 
13 
52% 
49% 
40 % 
9% 
4% 
8% 
5% 
1500to2000 1 
fathoms 1 
394 
269 
99 
137 
26 
15 
10 
19 
68% 
25 % 
37% 
7% 
4% 
3% 
5% 
! lOOOtoISOO 1 
tathonu f 
I 
493 
227 
194 
263 
34 
28 
26 
48 
46% 
39% 
53% 
7% 
6% 
5% 
10 % 
; 500 to 1000 1 
j fathoms ) 
616 
3.'13 
281 
161 
25 
22 
57 
30 
57% 
45% 
26 % 
4% 
4% 
9% 
5% 
1 l«Tto WT ~ ^ 
fathoms | 
1887 
824 
43% 
952 
50 % 
359 
*9% 
37 
2 % 
33 
2 % 
76 
4% 
73 
4% 
Umler 100 1 
1 fathoms / 
4248 
1472 
35% 
2390 
56 % 
571 
•3% 
26 
0-6% 
31 
07 % 
94 
2 % 
88 
2 % 
The following epecice h*vc bwn ina«lvcrt*ntly oraittx’d from the foregoing bathymetrical lists, and arc therefore not 
ioclodail in the fWm in these tables: — Holnp$am.ma argillaccum, Hyalonema ( Stylocalyx) elngans, Siphonogorgia godeffroyi, 
Frfvftla rrmex, Peningtmt chalUngrri, Peniagone naresi, Seotoplancs insignis, Slirhnpus challengeri, Bythocythcrc arenouxn, 
BytkorythfT* oritnUdU, ByOiorythrrt velifera, Cythcre /arlificiUa, Cythere levclea, Cylh/irella cingulata, Loxnconcha a/ricana, 
PUfenpt faruM, XatoUberri inttrmfdia, Ischnctmna baeilltu, Admon ( Buccinuhu) cinerms, Ptwlulopora. defiexa, Bathydraco 
anlardicuM, FiMularia deprcua, Ottracion eomulut, Polyijmus spinarus, Scopelxu engraidis. 
