Mr. Eyton on the Fauna of Shropshire, 55 



Larusfuscus, Linn. (Lesser Black-backed Gull.) One specimen 

 is in my collection: killed near Holyhead. 



Larus marinus, Linn. (Greater Black-backed.) Said to breed 

 near the South Stack lighthouse, but I have never observed it. My 

 specimen was killed feeding at a dead horse near Holyhead. 



Chroicocephalus ridibundus, nobis. (Laughing Gull.) Common. 



Chroicocephalus capistratus, nobis. (Brown-headed Gull.) One 

 specimen only has occurred and is in my collection : killed near 

 Bangor. 



Sterna arctica, Temm. (Arctic Tern.) Breed on the Skerries : 

 the trachea possesses a second pair of muscles of voice besides the 

 usual stemo-tracheal ones corresponding to the fifth pair of Mr. Yar- 

 rell found in the Raven. 



Sterna marina, Ray. (Common Tern.) Also breeds at the Skerries. 



Sterna Dougallii, Mont. (Roseate Tern.) One specimen is in my 

 possession, killed near Longden mill, three or four years ago. 



Phalacrocorax Carbo, Auct. (Common Ray.) Breeds in numbers 

 on Holyhead mountain. 



Phalacrocorax Graculus, Lath. (Crested Cormorant.) One or 

 two nests of this species are found every year on Cardinal's Point ; 

 both this and the foregoing possess two pairs of muscles of voice, the 

 first, the usual stemo-tracheal ones, the second continued from the 

 point at which the first pair branch off to the upper rings of the 

 bronchiee, between which and the last tracheal ring is situated a 

 membrane stretched and able to be rendered more or less tense by 

 the action of the muscle. 



Sula Bassana, Briss. (Gannet.) I never heeird but of the occur- 

 rence of one specimen in the district ; it was picked up exhausted, in 

 the neighbourhood of Holyhead. 



Mergus Merganser, Ray. (Common Merganser.) Often killed 

 on the Welsh lakes and on the Severn during hard weather. 



Mergus albellus, Linn. (Smew.) Found in the same localities 

 as the preceding. 



Mergus cucullatus, Linn. (Hooded Merganser.) One specimen 

 is in my collection, killed on the Menai Straits during the winter of 

 1 834 ; it is a young male of the year. 



Mergus Serrator, Linn. (Red-breasted Merganser.) One or two 

 specimens occurred last winter on the Severn. 



Clangula chrysophthalmos, Steph. (Common Golden Eye.) Com- 

 mon on the coast, and occasionally found on inland waters during 

 winter. 



