REPORT OF COMMISSIONER OF FISH AND FISHERIES. [114] 
This is a more slender species than O. illecebrosus, with a shorter fin, 
and it has but four rows of small suckers on the distal part of the club, 
instead of eight. The most important differences, of generic value, are 
the presence of connective suckers and tubercles on the tentacular arms, 
and the great development of the marginal membranes on the lateral 
arms. The grooves in the siphon-pit are of comparatively little impor- 
tance. 
ARCHITEUTHIS Steenstrup (see page 23). 
This genus, which includes the most gigantic species known, differs 
from Sthenoteuthis mainly in having a smaller and differently shaped cau- 
dal fin, and in lacking the broad lateral membranes on the lateral arms. 
The pen is also different, judging from the portions preserved. The large 
tentacular suckers are more evenly and regularly denticulated; and 
those of the sessile arms are smaller, with less claw-like teeth. 
From Ommastrephes it differs in the form and size of the fin and 
pen, and especially in having connective suckers and tubercles at the 
bases of the tentacular clubs. 
Architeuthis Harveyi Verrill (see pages 23--40).—Giant Squid. 
(Plates I-VI.) 
Fishing banks off Nova Scotia to Labrador. Northern Europe? 
Architeuthis princeps Verrill (see pages 41-50).—Giant Squid. 
(Plates VII-XI.) 
Newfoundland and the Grand Banks to Labrador. Northern Europe? 
FAMILY MASTIGOTE UTHIDA Verrill. 
Bulletin Mus. Comp. Zool., viii, p. 100, March, 1881. 
Body slender, pointed behind. Caudal fin large, rhombic. Mantle 
united to neck by three movable cartilages. Siphon with an internal 
valve and one pair of dorsal bridles. Eyes large, not prominent; lids 
free, simple. Buccal membrane 6-angled, without suckers. Arms free; 
suckers in two rows. Tentacular arms (in the typical species) not ex- 
panded into a club, the terminal portion round, tapering, covered with 
a multitude of minute suckers, inmany rows. No auditory crests. Pen 
narrow, with a long, hollow posterior cone. 
This family differs from Ommastrephide in lacking distinct lachrymal 
sinuses and auditory crests, in the remarkable character of the tentacular 
arms, and in the simple connective cartilages. From Chiroteuthide and 
Histioteuthide it differs in having the siphon provided with a dorsal bridle 
and internal valve, as well as in the armature of tentacular arms. 
It is doubtful whether Calliteuthis belongs near this family, its'tentac- 
ular arms being unknown, and its pen being entirely different. Possi- 
bly it may belong to the Chiroteuthide. 
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