238 The Irish Nahiralist. [October, 



Stercorarlus pomatorhlnus, Teinininck. Pomatorhinb Skua. — 

 Irregular visitor to Dublin Bay in autumn. 



S. crepldatus, Gmel. Richardson's Skua.— Occurs irregularly in the 

 autumn. 



S. parasiticus, Linn. Buffon's Skua. — Autumn visitor, but much 

 rarer and smaller than the preceding species. The Skuas are 

 strongly built dark birds of predaceous habits, chasing Gulls and 

 forcing them to give up their food. They also feed on small water- 

 birds and eggs. 



Order TURBINARES. 



Puffin us angrlorum, Temminck. Manx Shearwater.— Common 

 in the bay, preferring deep water. Easily distinguished from the 

 Razorbill and Guillemot by its more pointed wings and more 

 buoyant flight. 



Order PYGOPODES. 



AIca torda, Linn. Razorbii,!., " Diver"— Common in Dublin Bay. 



Characters familiar. 

 Uria trolle, Linn. Common Guii^lemot, " Diver."— Common in 



Dublin Bay. Characters familiar. Larger than preceding species. 



Fratcrcula arctica, Linn. Puffin. — Common in summer. Charac- 

 ters familiar. Smaller than Razorbill. A specimen picked up on 

 the Bray strand on 2nd January, 1S91, is in the author's private 

 collection. This bird is very rare in winter {j)ide Daily Express, Jan. 

 6, 1891). 



Colymbus glaclalls, Linn. Great Northern Diver, — Often 

 occurs in winter and spring. A large bird with handsome variegated 

 plumage. 



C. arctlcus, Linn. Bi,ack-ThroaTED Diver. — Much rarer than last, 

 but occurs occasionally in winter and spring. Distinguished by the 

 colour of its throat. 



C. septcntrlonalls, Linn. Red-throated Diver.— Commoner 

 than last and frequently occurring in winter and spring. Throat 

 reddish. 



Order STEGANOPODES. 



Phalacrocorax carbo, Linn. Cormorant. — Common at all times. 



Characters familiar. 

 P. grraculus, Linn. Sh AG.— Frequent in Dublin Bay. Resembles the 



Cormorant, but is smaller in size. 



Order HERODIONES. 



Ardea cinerca, Linn. Heron, " Crane."— Common at all times. 

 Characters familiar. 



