[91] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
alcohol of moderate strength, repeatedly changed; at the present tiino 
the strength of the alcohol is about 80 per cent. They are in good con¬ 
dition, moderately firm and not badly contracted. Those designated as 
D, E, F, 1ST, O, P were also collected at one time, in August, and pre¬ 
served together. They are in fair condition, but not so well preserved 
as the former lot. Those numbered ii to xiv were preserved together 
about the last of July. They were placed in strong alcohol, and are 
hard and badly contracted. J, K, and L were preserved together, but 
were originally found dead on the beach and in a relaxed state. They 
are only moderately contracted by the alcohol. 
Measurements of Ommastrephes illecebrosus ( in inches). 
Tail to tip of dorsal anna. 
Tail to tip of second pair arms.. 
Tail to tip of third pair arms . 
Tail to tip of fourth pair arms. 
Tail to tip of tentacular arms. 
Tail to base of dorsal arms. 
Tail to center of eye.. 
Tail to edge of mantle, above. 
Tail to edge of mantle, below.. 
Tail to insertion of fin.. 
Breadth of fin. 
Between lateral insertions. 
Front edge, outer angle to insertion. 
Outer angle to tip of tail.. 
Circumference of body.. 
Breadth of body. 
Breadth of head at eyes. 
Breadth of eye-opening. 
Breadth of siphon at bridle. 
Length of head, mantle to base of dorsal 
arms. 
Length of dorsal arms.. 
Length of 2d pair. 
Length of 3d pair. 
Length of 4th pair. 
Length of tentacular arms. 
Length of club . ... 
Breadth of dorsal arms. 
Breadth of 2d pair.. 
Breadth of 3d pair. 
Breadth of 4th pair. 
Breadth of tentacular arms. 
Breadth of club. 
Front to back of 3d pair.. 
DIAMETER OF SUCKERS. 
Largest on tentacular arms .. 
Largest on 3d pair.. 
Largest on ventral arms... 
PROPORTIONS. 
Fin-length to mantle-length, 1:. 
Fin-breadth to mantle-length, 1: .. 
Length * to breadth of fin, 1:. 
Length of head to mantle, 1:. 
Length of dorsal arm to mantle, 1:.. 
Tentacular suckers to mantle, 1:. 
0?* 
j r? 
D? 
E$ 
Jcf 
Icf 
Ref 
W<f 
Fresh. 
13. 40 
13. 00 
12. 75 
10. 50 
13. 50 
10. 50 
10. 50 
8.25 
12. 04 
14. 20 
13. 70 
14. 30 
10. 80 
11.10 
12.84 
14.20 
13. 70 
i3. 25 
ii. oo 
14. 20 
11. 00 
11. 20 
12.84 
13.10 
13. GO 
13. 40 
10. 60 
11. 00 
12 44 
10. 50 
17. 50 
15.5 
. 
12. 00 
15.50 
12. 20 
12. 50 
16.12 
10. 00 
9.40 
9. 00 
7. 90 
10.00 
8. 30 
8. 20 
6.50 
8.84 
9. 30 
8.90 
8. 25 
7. 35 
9. 50 
7. 75 
7. 70 
8. GO 
8.00 
7. 75 
7.10 
8.70 
7. 50 
7. 20 
5.70 
8. 20 
7. 50 
7. 30 
8.10 
7.15 
6. 65 
5. 38 
3. 30 
3.20 
3.10 
2. 75 
3. 50 
2. 90 
2. 80 
2.10 
3. 441 
4.20 
4. 30 
4. 25 
3. 78 
5.15 
3. 80 
3.90 
2. 65 
3. 60 
. 50 
.40 
.65 
.45 
2.20 
2. 20 
2. 00 
1. 90 
2. 50 
2. 80 
2.10 
1.45 
3. 30 
3. 25 
3.15 
2. 90 
3. 50 
3. 00 
2. 90 
2. 00 
4. 80 
4. 80 
6. 50 
4. 30 
4. 00 
1. 70 
1.60 
2.15 
1. 30 
1. 40 
1.10 
1.40 
1. 60 
1. 50 
1.35 
1. 15 
1. 65 
1.20 
1.30 
1.00 
.40 
.45 
. 35 
.36 
.20 
.23 
.25 
.75 
.70 
. 65 
.78 
. 60 
.55 
1. 40 
1.40 
1. 25 
.80 
1. 30 
.80 
1.00 
.80 
3. 75 
3. 60 
3.25 
2. 70 
2. 65 
2. 20 
2. 43 
1.75 
3. 20 
4. 30 
4. 20 
4.00 
3.15 
4. 40 
2. 70 
3.12 
2.25 
4. 00 
4.10 
4. 25 
4.00 
3. 00 
4. 55 
2. G7 
3.15 
2.25 
4. 00 
3. GO 
3. 80 
3. 50 
2. 80 
3. 80 
2. 43 
2.75 
2.00 
3. GO 
6.80 
8. 00 
6. 50 
4. 00 
5. 80 
4. 00 
4.10 
4. 50 
7. 28 
3. 30 
3. 50 
2. 75 
1. 85 
2. 55 
1. 75 
1.90 
1.30 
.35 
.36 
.28 
. 25 
. 35 
. 30 
.20 
.45 
.44 
. 35 
. 30 
.45 
. 35 
.25 
.45 
.44 
.35 
.28 
. 50 
. 25 
.44 
.42 
.32 
. 30 
.45 
. 35 
.25 
.25 
.28 
.30 
.30 
.28 
.20 
. 17 
.30 
.30 
.22 
. 18 
.25 
99 . 
.65 
.60 
.50 
.40 
. 65 
. 45 
. 18 
.17 
. 15 
. 11 
. 17 
* 
. 11 
. 13 
. 18 
.16 
. 14 
. 11 
.20 
. 14 
. 14 
. 11 
.11 
. 10 
.09 
. 11 
. 09 
. 07 
2. GO 
2. 50 
2. 50 
2. 58 
2.48 
2. 58 
2. 57 
2.71 
2. 04 
1.86 
1.82 
1.87 
1.69 
1. 97 
1.84 
2.15 
1.27 
1.34 
1. 37 
1.37 
1.46 
1. 30 
1.39 
1. 26 
6.14 
5.70 
6. 20 
8. 87 
6.70 
9. 30 
7.20 
7. 12 
2.29 
2. 22 
2. 38 
2. 62 
3. 28 
3. 40 
2. 96 
3.25 
47. 77 
47, 05 
51. l>6 
64.54 
51.20 
68.18 
55. 38 
* The length of the fin, in these tables, means the distance from the lateral insertions to tho tip of 
the tail, which is somewhat less than the extreme length. 
Some specimens, included both in this and the following tables, show 
small differences in their measurements (made at different times), due 
partly to the different degrees of extension employed in measuring 
them, and partly to the fact that the alcohol had been changed and its 
strength altered. 
