258 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [48] 



lll ,nm iu total liight or breadth ; S£ mm from tip of beak to anterior end 

 of palatine lamina ; 20 mm from tip of beak to the bottom of the notch. 

 The lower mandible measured 96 mm in total length; SQ mm from tip of 

 beak to inner end of alae ; 19 m,n from tip to bottom of notch. 



At the present time (January, 1880), the breadth of the upper man- 

 dible is about 90 mm ; from tip of beak to anterior end of palatine lamina 

 (at junction with anterior edge of alae), S9 mm ; tip of beak to bottom of 

 notch, 19 mm ; breadth of palatine lamina, 58 mm ; beak to posterior end 

 of frontal lamina, 90 mm ; beak to posterior lateral edge of alae, 43"™; 

 notch to end of anterior edge of alae, 33 mra ; notch to end of hardened 

 or black portion of same (proper cutting edge), 17 mm ; transverse 

 breadth at notches, 16 mm . The lower maudible measures, iu length, 

 82 mm ; beak to inner end of alae, 67 rara ; to bottom of notch, 18 mm ; breadth, 

 alae to mentum, 78 mm ; end of alae to outer side of gular lamina, 84 mm ; 

 inner side of gular to mentum, 50 mm ; breadth of gular, 44 mm ; breadth of 

 alae, anterior to posterior edge, laterally, 29 mm ; tip of beak to posterior 

 ventral end of mentum, 33 mm 5 tip to posterior lateral border of alse, in 

 line with cutting edge of rostrum, 45 mm ; posterior lateral border of alae 

 to end of gular, 40 mm ; depth of notch, 3 mm ; breadth of tooth, 8 mm ; 

 notch to end of cutting or hardened edge of alae, 20 mm ; to inner end of 

 alae, 55 mra ; breadth transversely, across teeth, 16 mm . (See also the fol- 

 lowing table of measurements of jaws). 



The beak of the upper mandible is sharp, strongly and regularly 

 curved, most so near the tip ; a radial ridge runs from the notch to the 

 lateral borders of the alae 5 the anterior or cutting edges of the alae are 

 somewhat convex and irregularly crenulate. The lower mandible has a 

 sharp beak, with a slight notch close to the tip ; the cutting edges of 

 the rostrum are otherwise nearly straight ; the notches at the base are 

 deep and narrow V-shaped. The teeth are rather prominent, obtuse, 

 slightly bilobed at the summit ; the one on the right side of the mandi- 

 ble is more prominent than the other, owing to the fact that the edge 

 of the ala, beyond it, is more concave in outline. There is also a broad 

 and slightly prominent lobe in the middle of the anterior edges of the 

 alae. The sides of the rostrum are strongly excavated toward the base 

 and around the notches, and radially striated. The jaws are dark 

 brown, becoming blackish toward the tips. 



