314 BIRDS. PALMIPEDES. 



P. obscura, Gmel. Dusky Petrel. Bill very slender, 1 inch 1 line 

 long ; tail rounded, wings ending at its extremity ; length of the 

 tarsus 1 inch 6 lines ; plumage dusky above, white beneath. 10 

 inches long. Southern Seas. Tern. Man. 808. 



3. SWALLOW PETRELS Bill shorter than the head, much com- 

 pressed at the point ; nostrils in a single tube with two distinct 

 orifices ; tail square or slightly forked, 



P. pelagica, Lin. Stormy Petrel, Mother Carey's Chicken. Tail 

 square, extremity of the wings a very little exceeding its tip ; 

 length of the tarsus 10 lines ; head, back, wings, and tail, dull 

 black ; under parts sooty ; a broad transverse and pure white 

 band on the rump ; scapulars and secondary wing-quills tipped 

 with white ; bill and legs black ; iris brown. 5 inches long. 

 Inhabits Europe, &c. Pen. Brit. Zool. ii. pi. 36. 



P. Leachii, Tern. Head and body dull black ; sides of the belly 

 and upper tail coverts white, with the shafts brown ; quills and 

 tail black ; tail forked, extremity of the wings not surpassing it ; 

 length of tarsus 11 lines. 7i inches long. Inhabits St Kilda. - 

 Shaw, xiii. pi. 25. 



P. gigantea, Lath. Giant or Osprey Petrel. Plumage brownish, 

 spotted with white above, white beneath ; shoulders, wings, and 

 tail, brown; bill and legs yellow; a naked, wrinkled, yellow mem- 

 brane at the corners of the mouth. 3 feet long. Inhabits South- 

 ern Seas. Shaw, xiii. 237- 



Gen. 8. PACHYPTILA, Illig. Procellaria, Lath. 



Bill thick, strong, much depressed, very broad ; upper mandi- 

 ble gibbous on the sides, interior margin with cartilaginous 

 plates ; ridge distinct, terminated by a compressed hook ; nos- 

 trils basal, opening by two apertures in a short tube ; three 

 toes before, with deeply cut membranes ; a short claw in place 

 of the hind toe. 



P. Forsteri. (P. vittala, Lath.) Plumage above bluish ash, be- 

 neath white ; quills, tail-feathers at the tip, and band on the 

 expanded wings brown black. 12 inches long. Inhabits South- 

 ern Hemisphere. Shaw, xiii. 251. 



Gen. 9. HALADROMA, Illig. Procellaria, Lath. 



Bill short, straight, compressed, edged, furrowed longitudinally, 

 tip hooked ; lower mandible with a small dilatable and nak- 



ed pouch ; nostrils distinct, the base concealed under a tube ; 

 legs short ; only three toes, directed forwards, palmated ; 

 wings short. 



H. urinatrix. Diving Haladrome. Plumage dark brown above ; 

 chin black ; white below. 8 inches long. Inhabits New Zea- 

 land Shaw, xiii. 257. 



