204 
A. E. Yerrill — North American Cephalopoda. 
but is interrupted on the outer side for about a third of the circumfer- 
ence ; the outer third portion of the horny ring is somewhat flattened 
from the circular form. 
The terminal division of the arm is 22 , 8 cm long. It gradually 
becomes much compressed laterally, and tapers regularly to the tip, 
which is flat, blunt and slightly incurved. .Tust beyond the large 
suckers, where this region begins, the circumference is 9 m . The 
face is narrow and bears a large number of small pedicellate suckers, 
(Plate X VP/, figs. 10, 10a) arranged in four regular, alternating 
rows, gradually diminishing in size to near the tip of the arm, where 
the rows expand into a small cluster of about ten smooth-edged 
suckers. The suckers, except in the final group, are much like the 
marginal ones of the previous division, and at first are 5 to 7 mm in 
diameter, but decrease to about 2‘5 ran ‘ near the tip of the arm. They 
have sharply serrate, oblique, marginal rings, broader on the outer 
side, with a peripheral groove on the front and sides only. In our 
preserved specimens the rings are gone from many of these small 
suckers, but those of the two rows next to the lower margin appear 
to have been larger than the others. 
The suckers of the final group are close to the tip, which is slightly 
recurved over them. They are flat, attached to short pedicels, and 
provided with a narrow horny rim. which has the edge smooth, or 
nearly so, and surrounded by a thick membranous border. The 
diameter of these suckers is from *5 to 2 mm . They are rather crowded 
and the cluster is broader than long. 
The color of the body and arms, where preserved, is pale reddish, 
with thickly scattered small spots of brownish red. 
The form of the jaws* of this specimen is well shown by Plate XV, 
figs. 1 and 2. When in place the tips of these jaws constitute a pow- 
* In order to explain the terms employed in describing the various parts of the jaws 
of C'ephalopods, as used in this article. I have introduced figures of the jaws of one of 
our eoramou small squids | Loligo pallida V.) 
from Long Island Sound. The nomenclature 
adopted is essentially that used by Professor 
Steenstrup. 
Figure 1. Upper mandible: a. rostrum or tip 
of the beak ; b. the notch ; c. the inner end of 
ala ; d. the frontal lamina ; e. the palatine 
lamina : ah. the cutting edge of beak ; be. _ 
anterior or cutting edge of ala. 
Figure 2. Lower mandible : a. rostrum : ah. cutting edge ; be. anterior edge of 
ala ; d. mentum or chin ; e. gular lamina. 
