Tlie Cachalot.'] OF ORKNEY. , l6S 



a tooth the length of which was seven inches three quarters ; 

 the tooth was immersed in the jaw as far as that hollow. 



It had two pectoral fins, and a third situated on its back, 

 which Sir Robert compares to the mizen-mast of a ship. 

 The head was full of spermaceti of the best sort. 



See Plate III. Vol. 3. fig. 1. British Zoology, for a figure 

 of the teeth of this species. 



Sir Robert Sibbald speaks of another vast fish of this kind, 

 but seems not to be certain what species it was, because of 

 the lame description he had of it. 



GENUS III.— CETACEOUS FISH, WITH TEETH IN 



BOTH JAWS. 



Species 1. — The Porpesse. 

 Porpesse, fTzY. Icth. 31. Rail Syn.Pisc. 13. Delphinus Phocsena, iz'w. Sys. 108. 



t 



In the summer season, in May especially, June, July, and 

 August, porpesses swarm in our seas ; often seen in flocks of 

 hundreds, making the whole sea foam again, while they pur- 

 sue the lesser fishes, or the females are in season, which I 

 think happens in May, as they are then most frolicksome, 

 and make the greatest stir, keeping together in greater num- 

 bers in that month than other times of the year. The por- 

 pesse comes regularly into our sea when the colder months 



