CEPHALOPODA OF THE HAWAIIAN ISLANDS. 
285 
Measurements op Tremoctopus vioeaceus. 
Number in author’s register 
221 
221 
21S 
219 
218 
218 
217 
223 
225 
21S 
224 
217 
218 
Station where taken 
3930 
3930 
3878 
3926 
3878 
3878 
3799 
4010 
4086 
3878 
4011 
3799 
3878 
$ 
9 
5 
$ 
9 
2 
2 
c? 
s 
s 
c? 
d 
d 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
Total length 
64+ 
51+ 
48 
44+ 
33 
30 
6 
30 
24+ 
25 
21 
IS 
14 
Length of mantle (dorsal) 
16 
13 
10 
10 
9 
8 
3 
10 
8 
7*5 
6 
6 
4 -S 
Width of mantle 
IS 
II 
10 
10 
9 
7 
3 
7 
10 
7 
6-5 
7 
4*5 
Width of neck 
8 
8 
8 
6 
8 
Width of head 
IS- s 
12 
II 
II 
10 
8 
2-5 
8 
9 
7 -S 
7 
6 
4-5 
I^ength of funnel 
I.ength of right dorsal arm 
40+ 
37+ 
34 
28+ 
22 
18 
2*5 
18 
10+ 
16 
14 
9 
9 
Length of right second arm 
28 
27 
8 
6-S 
18 
14 
8 
6-5 
8 
Length of right ventral arm 
19 
14 
6 
Len^h of left ventral arm 
6 
Length of umbrella between dorsal arms. . . 
14 
13 
9 
9 
7 
3 
6 
6 
3 -S 
4 - 5 
2 
•5 
Length of umbrella between ventral arms . 
Length of umbrella between dorsal and 
second arms 
17 
6 
3-5 
Material examuied . — The 31 specimens examined are of various ages but almost equally males and 
females: 
No. 
speci- 
mens. 
Locality. 
Depth. 
Albatross 
station 
No. 
Sex. 
Author’s 
register 
No. 
4 
Lat. N. 59° 25', long. W. 139° 31', between Erben Bank and Kaiwi Channel. . . 
Surface. . . . 
3799 
i <?32 
217 
3878 
3 
Lat. N. 21® i$\ long. W. 158® 43', between Honolulu and Laysan Island 
. ..do 
3926 
219 
I 
Lat, N. 23® 19', long. W. 166® 54', between Honolulu and Laysan Island 
...do 
3929 
d 
220 
3 
Lat. N. 25° 07', long. W. 170° 50', between Honolulu and Laysan Island 
. .. do 
3930 
Id 2 ? 
22Z 
2 
Lat. N. 25® 27', long. W. 171® o8', between Honolulu and Laysan Island 
...do 
3931 
d 
322 
tdl? 
?d 42 
4086 
225 
Remarks .- — Owing to the great confusion which prevails in the various published accounts of the 
species of this genus, the identification of even so excellent a series of specimens as the present is not an 
easy task and the final conclusion attained is not altogether satisfying. It must be admitted that the 
temptation is very great to rmite practically all the alleged species of Tremoctopus under the oldest 
name of which we chance to have knowledge as applied to a member of this group — ^the Tremoctopus 
violaceus Delle Chiaje 1829. This is in effect what has been done by Jatta “ (1896, p. 204) and more 
“ J atta includes all the following in the synonymy of T. molaceus: 
Octopus velifer F^russac 1830, 
Philonexis Quoyanus d’Orbigny 1835. 
Philo'uexis ailanticus d’Orbigny 1835. 
Philonexis microstomus d’Orbigny 1835. 
Philonexis hyalinus d’Orbigny 1835. 
Octopus {Philonexis) hreroipes d’Orbigny 1835. 
Octopus semipalmaius Owen 1S36. 
Octopus Delaine Rang 1837. 
Octopus KoUikeri V< 5 rany 1847. 
60289° — Bull. 32 — 14 19 
