290 
A. E. Verrill — North American Cephalopoda. 
alternating with these, on each margin there is a row of smaller, 
more oblique, sharply denticulate, marginal suckers; distal nar- 
rowed face of the club covered with four rows of minute crowded 
suckers, and’a small cluster at the tip; the proximal part of the club 
has an irregular group of few, small, denticulate suckers, beyond 
which, extending down on the upper margin of the arm, is a row of 
about five or six small, smooth edged, connective suckers, alternating 
with small round tubercles, of corresponding size ; along the lower 
edge of the arm, for about the same distance, there is a row of more 
minute pedicelled suckers. The horny rings of the larger median 
suckers are oblique, and the edge is divided into many small slender 
teeth, longer on the outer margin ; the teeth of the marginal suckers 
are similar, but more unequal and more incurved. 
Specimens in alcohol generally show a distinct, dark purplish 
brown dorsal stripe, where the cbromatophores are very much 
crowded. 
Total length to tips of lateral arms, 121 mm ; tail to base of arms, 
93 ; body, 82 ; length of caudal fin, to insertion, 29 ; its breadth, 
58; diameter of body, 16 ; length of tentacular arms, 48 mm . Young. 
Middle Atlantic and West Indies; common in the region of the 
Gulf Stream. 
This is an exceedingly active species, swimming with great veloc- - 
ity, and not rarely leaping so high out of the water as to fall on the 
decks of vessels. On this account it has been called the “ flying 
squid” by sailors. 
It is a more slender species than 0. illecebrosa , 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 ten- 
tacular arms, and the great development of the marginal membranes 
on the lateral arms. The grooves in the siphon-pit are of compara- 
tively little importance. 
G-onatUS Gray. 
Gonatus Gray, Catalogue Mollusca Brit. Mus., i, Cephal. Antep., p. 67, 1849, (char- 
acters inaccurate.) 
Body slender, tapering ; caudal fins short, broad, united posteriorly. 
Pen narrow anteriorly ; thin and lanceolate posteriorly, with a termi- 
nal, hood-like expansion. Sessile arms with four rows of small, pedi- 
cellated suckers, those of the two median rows larger, with a horny 
ring, having a single large hooked claw on the outer edge ; outer 
