422 MERGANSER. 



other bird that is furnifhed with a creft at all; for in fuch xht fe- 

 males, in many cafes, have not even the rudiment of one. Again, 

 fome of the Dun-Divers have been proved to have a labyrinth, as 

 well as the Goofanderi by this is meant an enlargement of the 

 bottom of the -wind-pipe, juft before the entrance into the lungs : 

 and as it is only found in the males of the Duck kind *, we have 

 a right to conclude the fame in refpe6t to the birds in queftion, 

 efpecially as they are the neareft link to the Duck genus. But a 

 far more interefting circumftance than any of the above-noted 

 is, that fome of the larger Dun-Divers have really proved, on 

 diffetlion, to be males. This difcovery I owe to the attention of 

 Dr. Heyfham, who informs me that he has more than once found 

 it to be fo. The laft he met with of that fex, was at Carlijle, in 

 the month of December. He likewife obferves, that the Dun- 

 Diver is infinitely more common in Cumberland than the Goofan- 

 der, at lead: ten or fifteen of the firft to one of the laft, which 

 indeed is fo fcarce there, that he never had an opportunity of dif- 

 fering more than one, which however turned out to be a male, 



* Raj's words run thus, in refpeft to the Dun-Diver : " Haec etiam ampullam 

 " feu labyrinthum in afpera arteria habet :. quod maribus proprium opinati 

 " fumus." — Syn. p. 135. 



In Willugbby we find the following. — " In the Dun-Diver, which we take to 

 " be the female of the Goo/ander, we found a large labyrinth — fo that we will not 

 " be very confident that the Goo/ander and D.tu-Di-ver differ no more than in 

 «« fex."— Orn. p. 336. 



Briffbn's figure of the Harle cendre, ou Bie-vre, the Mergus Cajlcr of LinntSus, 

 defcribed by us above, is faid to be that of the male bird. In refpett to cur fpe- 

 cimen, this matter could not be afcertaincd; as, the bird having come from a 

 great dillance, the inward parts were too much difiblved to be attended to with 

 any degree of certainty. 



Having 



