406 SUPPLEMENT. 



The intermaxillary bones are capable of being protruded nearly 

 an inch beyond the maxillaries, and are armed with a single 

 row of small pointed teeth upon each side, and two rows of 

 much larger teeth in their centre ; one of these rows upon the 

 edge, the other, within and beneath, very incurved ; upon the 

 upper jaw, at its tip, is a space of one and a half inches, desti- 

 tute of teeth ; on each side of this space, is one quite large tooth, 

 and a second, much smaller ; about half an inch outside of 

 these, a single row of eight or ten teeth, the three or four first 

 of which, are much the largest. On each side of the pharynx, 

 are three rows of sharp incurved teeth, about a line in length, 

 resembling spines ; these rows are arranged directly above each 

 other, and are double. The lower jaw has a single row of 

 numerous, very sharp teeth, some of them half an inch long ; 

 the tongue has a broad, bony, triangular plate, upon each side, 

 armed with two rows of teeth on each side, Avhich are turned 

 toward the throat. The distance from the margin of the upper 

 jaw to the eye, is equal to the distance between the eyes. Seve- 

 ral spines are observable upon the head ; two just back of the 

 snout, on each side ; a bifurcated one over the middle of the 

 eye, and another similar one at its posterior angle ; a small one 

 in a line back of these, at the posterior portion of the head. A 

 spine pointing forward, is situated at the angle of the jaws, 

 and three straight spines are seen back of this. The eyes are 

 nearly circular, half an inch in diameter ; the pupils, black : 

 the irides, yellowish brown, with darker rays. One inch back 

 of the snout, are two elongated tentacula, four inches long, of 

 the firmness of bristles, with the extremities free ; as the tenta- 

 cula are lying down, directly at their posterior extremities, is 

 situated a third, two inches in length, with about half of its 

 extent only naked ; these tentacula are capable of being ele- 

 vated at the pleasure of the animal. 



The first Dorsal is situated an inch and a half back of this 

 third tentaculum ; it is composed of three small rays, connected 

 by a dark colored membrane. 



The second Dorsal is two and a half inches back of the first ; 

 it is composed of eleven rays ; this fin is six inches long, three 



