348 DESCRIPTION OF A SQUALUS. 



jaw the teeth are rather larger than those of the su- 

 perior jaw; towards tiie anterior extremity and near 

 the angle of the jaw they are a little elongated and 

 lanceolate, less conic but somewhat more compressed; 

 the intermediate ones are bifid and substrifid, those 

 of the anterior extremity are sensibly emarginate ; 

 these teeth are not implanted deeply in the skin, 

 and are disposed in 7 or 8 distinct ranges in the mid- 

 dle, the younger ones being on the interior range ; 

 fins eight ; first dorsal triangular, a little emarginated, 

 extended to a point, detached posteriorly, and placed 

 equidistant. Between the base of the caudal fin and 

 the tip of the rostrum, its height is 2 feet 8 or 10 

 inches, length 2 feet 10 inches, including the poste- 

 rior pointed lobe which is 8^ inches long ; second 

 dorsal very small, snbtriangular, witli a posterior 

 lobe detached at tip, its height is 8| inches and total 

 length 17 inches, it is placed before the line of the 

 anal fiu, and at the distance of 3 feet 3± inches from 

 the base of the caudal ; pectorals large, placed im- 

 mediately behind the fifth branchial aperture, at the 

 inferior part of the body, their extremity surpassing a 

 little the base of the first dorsal, they are strong an- 

 teriorly, and flexible posteriorly, of the length of 4 

 feet 1 inch, and 2 feet 1 inch and 8 lines in width; 

 ventrals subtriangular, nearly intermediate between 

 the first and second dorsals, anteriorly flexible, and 

 of the length of 1 foot 5 or 6 inches, by 2 feet and 2 

 inches in width ; the two organs, or large, subcylin- 

 dric appendages which are attached to them are pro- 



