408 SUPPLEMENT. 



perfectly smooth, for the most part, in front of the eyes, and 

 covered with circular and oblong mucous pores, which keep 

 this portion constantly lubricated. Snout, blunt. Nostrils, five 

 inches in front of the eyes, their lower portion upon the edge 

 of the upper lip. Eyes, very small ; diameter of the eye, three 

 inches ; largest circumference of the sclerotic coat, when re- 

 moved from the socket, eight and a half inches. Eyes very move- 

 able in their orbits ; distance between the eyes, two feet ; dis- 

 tance between the tip of the jaws, as artificially raised, two feet ; 

 this vertical gap is undoubtedly as much again, at least, in the 

 living fish, which gives us an opening of four feet. Mouth white, 

 mottled with fuliginous. Jaws, furnished with a great number 

 of small, incurved, pointed teeth. Six rows of these in the upper 

 jaw, and seven rows in the lower jaw ; the inner row in this 

 jaw, are hardly formed ; each of the rows in this jaw, as I count- 

 ed them in the mouth, contained one hundred teeth, from the tip 

 of the jaw to the angle of the jaw, or two hundred, as counted 

 from one angle to the opposite one, or in a word, fourteen hundred 

 teeth in this jaw. The teeth are conical, sharp, polished, with a 

 sensible ridge upon each side, often roughened, almost serrated ; 

 the lower portion of the tooth, striated ; one of the teeth in this 

 jaw is bifid ; the teeth at the angles of the jaws, short and 

 more compressed. The teeth in the centre of the jaw, are three 

 lines high above the jaw, and their base, or root, about the 

 same length within the socket. Temporal orifices, small, just 

 back of the angle of the jaw. 



From the tip of the snout to the first branchia, four feet nine 

 inches. Five very large branchiae, nearly surrounding the 

 head, as the animal was lying ; by measurement, the first pair 

 of branchiae were separated, on the neck, from each other, six 

 inches ; the second pair were separated, at the same situation, nine 

 inches ; the third pair, one foot three inches ; the fourth pair, one 

 foot nine inches ; the fifth pair, two feet three inches ; showing 

 the first to be much the largest. The first Dorsal fin is trian- 

 gular : two feet ten inches long, four feet four inches high, an- 

 teriorly, three feet posteriorly ; distance between the first and 

 second dorsal, six feet ; second dorsal ten inches long, sixteen 



