240 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [30] 



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 marginafones of the previous division, and at 

 first are 5 mm to 7 mm in diameter, but decrease to about 2.5 mm near the tip of 

 the arm. They have sharply serrate, oblique, marginal rings, higher 

 on the outer side, with a peripheral groove on the inner and lateral 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 pro- 

 vided 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 mm 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 III, 

 figs. 1, 2. When in place the tips of these jaws constitute a powerful 

 beak, looking something like that of a parrot or hawk, except that the 

 upper jaw shuts into the lower, instead of the reverse, as in birds. The 

 color is dark brown, becomiug almost black toward the tip, where its 

 substance is thicker and firmer, and smoothly polished externally. The 

 upper jaw (Plate III, fig. 1), in 1875, measured 79 mm in total length, 

 25 nm in transverse breadth, and 6G mm in breadth or height. The lower, 

 jaw (fig. 2) was 7G mm long, 70 mm transversely, and G7 mm broad, vertically. 

 It was larger when first received, but has subsequently shrunk con- 

 siderably more, in alcohol. 



The upper mandible has the rostrum strong, convex, acute, and 

 curved considerably forward, with concave cutting edges, and a slight 

 notch at its base. The anterior edges of the alee are irregular and 

 uneven. The palatine lamina is broad and thin. 



The lower mandible has the rostrum stouter and less curved, the tip 

 acute, with a distinct notch just below the tip, the cutting edges nearly 

 straight, and with a moderately deep and rather narrow notch at its 

 base ; a ridge runs backward from near the tip, in a curved line, cir- 



*In order to explain the terms employed in describing the various parts of the jaws 

 of Cephalopods, as used in this article, I have introduced figures of the jaws of one of 

 our common small squids (Loligo pallida V.) from 

 Long Island Sound. The nomenclature adopted is 

 essentially that used by Professor Steenstrup. 



Fig. 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; ab, the cut- 

 ting edge of beak; be, anterior or cutting edge of 

 ala. 



Fig. 2. Lower mandible: a, rostrum; ab, cutting edge; be, anterior edge of ala; d, 

 mentum or chin; c, gular lamina. 



