Ornithology of Sardinia. 345 



228. (Edemia fusca. 



Very rare. There is a single specimen in the museum at 

 Cagliari. 



*f 229. Mergus albellus. 



Of not uncommon occurrence in winter. 



230. Mergus castor. 



The rarest of the genus. There is one specimen in the 

 museum, a female or young male. 



231. Mergus serrator. 

 Common in winter. 



232. Pelecanus onocrotalus. 



Of very rare and accidental occurrence. 



f 233. Phalacrocorax carbo. 



Extremely common. I one morning early in March 

 counted forty-three in one flock flying like wild Geese from 

 the sea to feed during the day on the stagno of " Scaffa." 

 Many of them had the white spot on the hip. 



234. Phalacrocorax desmarestii. 



There are several named specimens of this very doubtful 

 species in the museum. They are all in immature plumage, 

 with one exception, and differ from the young of the following 

 species in having the breast and belly of a more decided 

 white, with a definite median stripe of still purer colour, about 

 an inch in breadth, running down the front of the throat. 



235. Phalacrocorax graculus. 



If the former species is indeed distinct, the occurrence of 

 the Shag in this island is, I think, doubtful. 



236. Phalacrocorax pygm^us. 



Rare. There is one specimen preserved in the museum. 



^~ 237. Sterna caspia. 



I did not meet with this Tern during any of my visits ; but 

 it is stated by Cara to be not uncommon, and Temminck 

 mentions its having been found breeding in the north of the 

 island (Man. Orn. iv. p. 454). 



