The Zoologist— Mav, 1871. 2598 



Porzana marginalis, Harth, (' Syst. Oin. West Africa,' 1857, 

 p. 241). — The solitary example (a young bird in its first plumage) 

 I fouiid in January on the oasis of Biskra. The Arabs affirm that 

 it is rare, being only found on " seggias." * 



Crex pratetisis, Bechst.— I killed a single specimen, in March, 

 on the oasis of Biskra. 



Gallinula chloropus, Lath.— Common on lakes and marshes in 

 the highlands as well as in the desert. 



Fulica atra, L. — Very common on lakes and on extensive desert- 

 marshes. 



F. cristata, Lalh. — Less numerous on lakes. 



Porphyrio hyaciitthiniis, Temm. — Common on Lake Fezzara. 



Sterna hinmclo, L. — Rarely seen on Lake Fezzara and behind 

 Constantine. 



Gelochelidon anglica, Brehm. — In small numbers on the sea- 

 coasl, and in flocks in March, on the lakes behind Constantine. 



Chroicocephahis mimctus, Eyt.— Common at all times in Stora 

 Bay. 



Gavia ridibunda, Briss. — Common on the sea-shore, and along 

 rivers towards the mouth. 



Rissa tridactyla, Macgill. — Seen sometimes on the sea-shore. 



Lnrus canus, L. — Very common on the shore : I saw some flocks 

 in passing flight over Lake Fezzara. 



L. argeiitatus, Briinn. — Seen frequently in Stora Bay, but in 

 small numbers. 



Lestris parasitica, Temm. — I saw one example in the bay near 

 Philippeville. 



Tlialassidroma pelagica, Vig. — I saw a pair in Stora Bay. 



Pitffinus obscurus, Boie. — I saw a few pairs, near Stora, in 

 November. 



Cheimlopex Mgyptiaca, Steph. — I saw a flock on the first lake 

 behind Batna. 



Auser cinereus, Mey. — On Lake Fezzara in December. 



A. Segetmn, Mey. — More numerous on Lake Fezzara than the 

 foregoing species. 



Casarca rutila, Bp. — On the lakes round about Batna. 



Vulpanser tadorna, Keys, et Bias. — In the same localities as the 

 last species. 



* A " seggia " is a branched canal for the irrigation of the oases. 



