360 A. JE. Verrill — North American Cephalopods. 
istence of large chromatophores on the inner surface of the arms, 
between the suckers, is also a good diagnostic mark, by which to dis- 
tinguish it from our species of Rossia, which have the corresponding 
parts nearly white, or with few and small chromatophores. 
Heteroteuthis tenera . — Specimens examined. 
Stat. 
N 
Lat. 
Locality. 
W. Long. 
Depth, 
Fathoms. 
When received. 
Specimens. 
No. Sex. 
U. 
■S. Fish Com. 
1880 
Off Martha's 
Vineyard. 
865 
40° 
05' 
70° 23' 
65 
Sept. 4. U. S. F. C. 
35 
7 9 
866 
40 
05 
18” 
70 22 
18” 
65 
it ti It 
3 5 
6 9 
867 
40 
05 
42 
70 22 
06 
64 
it Ik It 
45 
10 9 
869 
40 
02 
18 
70 23 
06 
192 
»t tt ti 
20 + , 5 & 9 
870 
40 
02 
36 
70 22 
58 
155 
Ik kt tt 
15 5 
17 9 
871 
40 
02 
54 
70 23 
40 
115 
kt tt kt 
18 5:11 9 :32j 
872 
40 
05 
39 
70 23 
52 
86 
kl kt It 
1 3 
2 9 
Off Newport , B. I. 
# 
873 
40 3 
02' 
70° 57' 
100 
“ 13, “ “ 
55 
1 9 
874 
40 
00 
70 57 
85 
ti ti ti 
10 5 
6 9 
875 
39 
57 
70 57 
30" 
126 
tt tt tt 
1 5 
876 
39 
57 
70 56 
120 
tt kt kt 
85 
6 9 
877 
39 
56 
70 54 
18 
126 
tt tt tt 
65 
49 
878 
39 
55 
70 54 
J 5 
1424 
tt tt tt 
1 5 
1 9 
879 
39 
49 
30’ 
70 54 
225 
tt tt tt 
6 
880 
39 
48 
30 
70 54 
252 
tt tt tt 
2 5 
Off 
Chesapeake Bay. 
899 
37° 
22' 
74 3 29' 
574 
Nov. 16, “ “ 
3 5 
2 9 
900 
37 
19 
74 41 
31 
it tt tt 
1 j 
901 
37 
10 
75 08 
18 
it It tt 
21 5 
3 9 
Blake Expedition , 
U. 
S'. Coast 
Surrey. 
313 
Off 
Charleston, 5 
5. C. 
75 
1880 
7 5 
5 9 
314 
32° 
24' 
78° 44' 
142 
1880 
2 5 
1 9 
316 
32 
7 
78 37 
30” 
229 
1880 
1 9 
j ■ 
321 
32 
43 
25” 
77 20 
30 
233 
1880 
5 9 
327 
34 
0 
30 
76 10 
30 
178 
1880 
1 5 
3 9 
345 
40 
10 
15 
70 4 
30 
71 
1880 
2 9 
j- 
Order II.— OCTOPODA Leach. 
Cephalopoda octopoda Leach. Zool. Miscel., iii, 1817 (t. Gray). 
Ferussae Tableau Syst., p. 18. 1821. 
D’Orbigny, Tab. Method., p. 45, 1825; D'Orbigny, Cephal. Acetab., p. 1. 
Odocera Blainv., Diet. Sci. Nat., vol. xxxii, 1824. 
Octopia Gray, Cat. Moll. Brit. Mus., i, p. 3, 1849. 
Anns eight, similar, all furnished with suckers in one or two rows ; 
often more or less united by a web, without natatory crests. Suck- 
ers sessile, not oblique, destitute of horny rings or hooks. No 
tentacular arms. Head often larger than the body. Body short and 
