204 



A. JEJ. Verrill — North American Cephalopods. 



1ml 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 circuhir form. 



The terminal division of the arm is 22*8™ long. It gradually 

 becomes much compressed laterally, and tapers regularly to the tip, 

 which is flat, blunt and slightly incurved. Just beyond the large 

 suckers, where this region begins, the circuiuference is 9'''". The 

 face is narrow and bears a large number of small pedicellate suckers, 

 (Plate XVIa, 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'""' in 

 diameter, but decrease to about 2*5'"™ near the tip of the arm. They 

 have sharply seri'ate, oblique, marginal rings, broader on the outer 

 side, with a peripheral groove on the front and sides only. Fn our 

 preserved specimens the rings are gone from many of these small 

 suckers, but those of the two row^s 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 

 diametej- of these siickers is from '5 to 2""", 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 s])ecimen 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 Cephalopods, as used in this article, I liave introduced figures of the jaws of one of 

 our common small squids {Loligo pallida Y.) 

 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 ; h. the notch ; c. the inner end of 

 ala ; d. the frontal lamina ; e. the palatine 

 lamina : ah. the cutting edge of beak ; he. 

 anterior or cutting edge of ala. 



Figure 2. Lower mandible : <i. rostrum ; ah. cutting edge ; 

 ala ; d. mentum or chin ; e, gulnr lamina. 



he. anterior edge of 



