AYES. 391 



sea-swallows and gulls which they have seen to capture fish, until these 

 let fall or disgorge the prey seized or swallowed, which then they catch 

 with watchful rapidity. 



B. Nostrils tubular. Feet tridactylous, with tarsi reticulato- 

 squamose. 



Haladrama ILLIG., Pelecanoides LAC., GRAY. Bill short, de- 

 pressed at the base, compressed at the tip, hooked. Nostrils supe- 

 rior, contiguous. Wings short, with first quill longest. Tail short, 

 rounded. 



Sp. Haladroma urinatrix, Procettaria urinatrix GM. ; New Holland ; Hold- 

 droma Berardii QUOY, TEMM. PL col. 517; from the Falkland Islands. 

 These small birds from the southern hemisphere much resemble Alca or 

 Mergulus, but are easy to distinguish by the covering of the tarsi. 



Pachyptila ILLIG., Prion LAC., GRAY. Bill moderate, depressed 

 at the base, with margins beset posteriorly with parallel lamellae. 

 Nostrils tubular, placed above the culmen of bill, opening by two 

 apertures. Wings moderate. Tail moderate, rounded. Claw ses- 

 sile, remote, in place of hallux. 



Sp. Packypthila vittata, Procellaria vittata FOBST., GM., TEMM. PL col, 528, 

 Cuv. R. ani., 6d. ill., Ois. PL 91, fig. 4; South Africa, &c. 



Puffinus RAY, BRISS. Bill moderate, slender, with tip of each 

 mandible curved. Nostrils tubular, placed above culmen of bill, 

 opening with double aperture. Wings long, pointed. Tail some- 

 what short, rounded. Eemote claw in place of hallux. 



Sp. Puffinus major FABEB, Procellaria Puffinus L. (in part), BUFF. PL enl. 

 962; Puffinus anglorum BAY (Procell. Puffinus L. in part), Puffinus 

 arcticus FABEB, NAUM. Taf. 277, &c. 



Procellaria L. (excl. many species), ILLIG. Bill moderate or 

 short, hooked at the tip ; lower mandible shorter, with angle some- 

 what prominent. Nostrils in a tubule above the culmen of bill, 

 opening by a single aperture, divided by a partition. Wings long. 

 Tail mostly rounded. Claw sessile, raised, in place of hallux. 



Thcdassidroma VIGORS, Hydrobatus BOIE. Tarsus longer than 

 toes, slender. Wings with second and third quills subequal, longer 

 than first, the second longest of all. Tail even. 



Sp. Procellaria pelagica L., BBISS. Ornith. VI. PL 13, fig. i, NOZEM. NederL 

 Vog. in. bl. 245, NAUM. Taf. 275, fig. i, GUEB. Iconogr., Ois. PL 62, 



