REPORT OF COMMISSIONER OF FISH AND FISHERIES. [ 42 ] 
vex in the middle and concave or excavated toward the margins, which 
are, therefore, rather sharp. The anterior borders of the aim are convex, 
or rise into a broad but low lobe or tooth beyond the notch, but beyond 
this they are nearly straight, but with slight, irregular lobes, which do 
not correspond on the two sides. The anterior edges of the aim make 
nearly a right angle with the cutting edges of the rostrum. The pala¬ 
tine lamina is broad, thin, and dark brown,becoming reddish brown and 
translucent posteriorly, with a thin whitish border. The surface is 
marked with unequal divergent strim and ridges, some of which, es¬ 
pecially near the dorsal part, are quite .prominent and irregular; the 
posterior border has a broad emargination in the middle, but the two 
sides do not exactly correspond. 
The lower jaw (Plate XI, fig. 2) was badly broken, and many of the 
pieces, especially of the aim, are lost, but all that remain have been 
fitted together. The extreme length is 92 mm (3.63 inches); the total 
breadth and the distance from front to back cannot be ascertained, 
owing to the absence of the more prominent parts of the aim; from tip 
of beak to posterior ventral border of mentum, 42.G mrn (1.68 inches); from 
tip of beak to posterior lateral border of aim, 55.9 ram (2.20 inches); from 
tip of beak to posterior ventral border of gular lamina, 60 mm (2.37 inches); 
from tip of beak to bottom of notch at its base, 20 mm (.80 inch); tip of 
beak to inner angle of gular lamina, 47 nim (1.85 inches); height of tooth 
from bottom of notch, 6.25 mm (.25 inch); breadth between teeth of oppo¬ 
site sides, 15 mm (.60 inch); breadth of gular lamina, in middle, 44.5 mra (1.75 
inches). The beak is black, with faint radiating strim, and with slight 
undulations parallel with the posterior border; the rostrum is acute, 
slightly incurved, with a notch near the tip, from which a very evident 
groove runs back for a short distance, while a well-marked angular 
ridge starts from just below the notch and descends in a curve to the 
ala, opposite the large tooth, defining a roughened or slightly corrugated 
and decidedly excavated area between it and the cutting edges; the 
cutting edge below this ridge is nearly straight, or slightly convex; the 
notch at its base is rounded and deep and strongly excavated at bot¬ 
tom; the tooth is broad, stout, obtusely rounded at summit, sloping 
abruptly on the side of the notch, and gradually to the alar edge. The 
anterior edge of the ala, beyond the tooth, is rounded and strongly 
striated obliquely; it makes, with the cutting edge, an angle of about 
110°. The inner surfaces of the two sides of the internal plate of the 
rostrum form an angle of about 45°. 
The lower jaw of Xo. 1 (Plate XI, figs. 3, 3 a) is represented only by its 
anterior part, the aim and gular laminm having been cut away by the 
person wdio removed it.* It agrees very well in form and color with the 
corresponding parts of the one just described, but is somewhat smaller. 
The lateral ridges of the rostrum are rather more prominent, and the 
* The specimen was given to the Smithsonian Institution by Mr. G. P. Whitman, of 
Rockport, Mass., in 1872. (No. 2524.) 
