PLATE LXV. 



Mergus Castor. Van A. Lath. Gen. Syn. 6. 420. 2. } 

 Dun-Diver, or Sparling fowl. Raii Syn. p. 134. A. 2. 



Will. Orn.p. 333. //. 64, [head) 



Albin. 1. pi. 87. 



Penn. Br. Zool. 2. p. 557. pi. 92. /g-. 2. 



Ara. Zool. N° 465. 



Lath. Gen. Syn. V. 6. p. 420. 2. 



». «%>/>/. 270. 



L'Harle cendre, ou le Bievre, Brif. Orn. 6. p. 254. pi. 25. 

 L'Harle femelle, Brif. Orn. 6. p. 236. 



Buff. Oif. 8. /. 272. 



— — PL enl. 953. 



After the account that has been given of this bird, in the defcrip- 

 tion of the male, Mergus Merganfer, plate 49, we can add nothing 

 material concerning it. In the Leverian Mufeum, the Dun-Diver 

 and Goofander are placed together as male and female. Pennant 

 has defcribed them as the two fexes of Mergus Merganfer ; and the 

 authority of Linnaeus may alfo be quoted to fanction this opinion. 

 Yet Latham has endeavoured to prove, by the mod fatisfactory 

 experiments, that they are diftin£t fpecies, and that Mergus Cafior is 

 only a variety of the Dun-Diver. Thus perplexed between fuch 

 oppofite opinions, both of which are advanced by the mod refpec- 

 table naturalifls, we can fcarcely determine to which opinion we 

 ihould incline ; but as the obfervation of Dr. Heyfham * mod evi- 



* Vide Defcription of Mergus Merganfer, pi. 49. 



dently 



