252 KEPORT 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 aire 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 aloe 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 stria? 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 alae, are lost, but all that remain have been 

 fitted together. The extreme length is 92 mra (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 alae ; from tip 

 of beak to posterior ventral border of mentum, 42.6 mm (1.G8 inches) ; from 

 tip of beak to posterior lateral border of alae, 55.9 ,rm (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" (1.85 inches); height of tooth 

 from bottom of notch, 6.25" lm (.25 inch) ; breadth between teeth of oppo- 

 site sides, 15 m,n (.60 inch); breadth of gular lamina, in middle, 41.5""" (1.75 

 inches). The beak is black, with faint radiating stria?, 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 angurar 

 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 No. 1 (Plate XI, figs. 3, 3 a) is represented only by its 

 anterior part, the ala? and gular lamina? having been cut away by the 

 person who 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.) 



