[ 103 ] ' CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
pie, long, acute, the outermost rather narrower at base and somewhat 
longer. 
Total length, 109 cm (43 inches); length of body and head, 48.2 cm (19 
inches); length of body from dorsal edge of mantle, 35.56 cm (14 inches); 
from ventral edge, 33.1G cm (13 inches); of head from edge of mantle to 
Measurements of Sthenoteuthis megaptera and S. pteropus (in inches). 
bfl c3 
© 
a 
P<3 
g a 
Length, tip of tail to end of dorsal arms. 
Length, tip of tail to end of third pair. 
Length to end of tentacular arms. 
Length to base of arms. 
From base of arms to mantle. 
Tip of tail to edge of mantle (above) . 
Tip of tail to edge of mantle (below). 
Tip of tail to center of eye. 
Length of caudal fin (tip*to insertion). 
Breadth of caudal fin . 
Breadth between lateral insertions. 
End of body to outer angle of fin. 
Front edge of fin, from outer angle to insertion 
Circumference of body. 
Breadth of body. 
Breadth of head. 
Diameter of eye-opening (longitudinal). 
Diameter of eye-opening (transverse). 
Length of tentacular arms. 
Length of dorsal arms (first pair). 
Length of subdorsal arms (second pair). 
Length of subventral arms (third pair). 
Length of ventral arms (fourth pair). 
Breadth of first pair of arms at base. 
Breadth of second pair of arms. 
Breadth of third pair of arms. 
Breadth of fourth pair of arms. 
Breadth of tentacular arms . 
Breadth of terminal club of same. 
Length of siphon in middle. 
Breadth of siphon at base. 
Breadth of aperture of siphon. 
25.5 
43 
19 
5 
14 
13 
6 
13.5 
2. 33 
7 
6.5 
12.5 
5 
4 
1.25 
.75 
24 
6.5 
27.5 
29.5 
20.5 
6.25 
14. 75 
14.5 
18.5 
6. 75 
11.25 
2 
7. 25 
5.5 
11.5 
4. 75 
3 + 
1.75 
1. 25 
■ 7.25 
8 
8.5 
8 
.75 
1.12 
1. 00 
1.00 
. 33-. 50 
.75 
8. 75 
9. 25 
9. 25 
.75 
.80 
.90 
.90 
. 40-. 75 
2.5 
.2 
.1 
DETAILS OF TENTACULAR ARMS. 
Length of ‘club,’ or expanded part. 
Length of part bearing large suckers. 
Length of ‘ wrist,’ bearing smaller suckers 
Length of tip, with small suckers. 
Breadth of 1 club ’ in middle. 
Breadth of middle of arm.. 
6.5 
3.25 
1.25 
1. 50 
.75 
.50 
DETAILS OF SUCKERS. 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
Diameter of 
largest suckers of tentacular arms 
rims of same. 
largest suckers of dorsal arms 
rims of same. 
largest suckers of second pair. 
rims of same. 
largest suckers of third pair. 
rims of same. 
largest suckers on ventral amis... 
rims of same. 
.40 
.32 
.40 
.32 
28 
20 
40 
28 
32 
24 
30 
23 
JAWS. 
Upper mandible, total length.. 
Upper mandible, tip of beak to bottom of notch. 
Upper mandible, tip to dorsal edge of frontal lamina_ 
Upper mandible, breadth between anterior lobes of alas 
Upper mandible, breadth of palatine. 
Lower mandible, total length. 
Lower mandible, depth, end of aim to meutum . .. 
Lower mandible, beak to notch. 
1.16 
.40 
.32 
68 
1.25 
40 
.34 
32 
.98 
32 
.25 
84 
.70 
16 
.91 
12 
.87 
44 
.31 
