82 Dr. GooDENoughV Defer tption of the Porbeagle Shark, 



Of the dorfal fins, the firft was fifteen inches and three quarters 

 from the point of the note; it flood eretl:, four inches and a half 

 high, and five and a half long. The fecond was twelve inches be- 

 hind this, of the fame length and fize as the anal, to which it 

 flood nearly opposite. 



The fkin, when ftroked backwards, was a little rough ifh, and an 

 obfolete line of minute tubercles ran from the head down the fides, 

 and at length ended in the thick elevated ridge, which took place at 

 the depreffion of the body near the tail. 



We have been hitherto fpeaking of the fins and the upper fide of 

 the body. 



On the under fide, from the point of the nofe to the noftrils, 

 were numerous minute pores or perforations. The noftrils were 

 three inches from the point of the nofe, of a lunar form, the extre- 

 mities pointing towards the tail. At an inch and one eighth from 

 the noftrils, was the higher! part of the curvature of the mouth. 

 The mouth was femicircular, about five inches wide. The upper 

 jaw had two rows of teeth, except in the front, where the two 

 middle ones flood fingle. The under jaw had two rows alfo, ex- 

 cept in the front, where the two middle teeth had a triple row. 

 The inward row was bent inwards, the others all turned outward. 

 The teeth were white, very fharp, fmooth, two-edged, with a little 

 acute procefs at the bafe on either fide. This procefs in many lay 

 concealed within the gums. The tongue was white, very fhort and 

 cartilagineous. 



All the fins were blueifh before and whitifh behind; they were 

 alfo all of a firm texture, very flrong, cartilagineous, and to all ap- 

 pearance, for I did not difTecl: them, without bone or nerve. 



The genus of Squalus is not well known, owing to the very im- 

 perfect defcriptions which we have of them ; this has induced 



me 



