474 BIRDS OF AUSTRALIA. 



Madeiran seas. Like P. turtur, the pectination of the bill is 

 not discernible when that organ is closed. 



I procured several examples of this bird in Bass's Straits 

 on the 16th of April 1839, when many were flying around 

 me. In colour and general appearance it resembles P. turtur, 

 except that it has a white face or no grey mark before the eye ; 

 but not in its admeasurements, which are as follows : — 



Total length 9 inches ; bill I-^q ; wing 6f ; tail 3f ; tarsi 1^, 



Sp. 643. PRION BANKSII. 



Banks's Prion. 



Pachyptila banksii, Smith, Zool. of South Africa, Aves, pi. 55. 

 Prion banksii, Gould in Ann. and Mag. of Nat, Hist., vol. xiii. p. 366. 



This species is constantly seen in all the south seas. In 

 breadth its bill is intermediate between that of P. turtur and 

 that of P. vittatus', it is, moreover, of a lengthened and 

 somewhat elegant form, and exhibits the pectination of the 

 mandibles when the bill is closed. 



In colour this species assimilates to the other members 

 of the genus. 



Sp. 644. PRION VITTATUS. 



Broad-billed Prion. 



Pachyptila vittata, 111. Prod. Syst. Mamm. et Av., p. 275. 

 Procellaria vittata, Forst. Draw., No. 86. 



forsteri, Lath. Ind. Orn., vol. ii. p. 827. 



Prion vittatus, Lacep. and Cuv, 



Pachyptila forsteri. Swains. Class, of Birds, vol. ii. p. 374. 



Prion vittatus, Gould, Birds of Australia, foL, vol. vii. pi. 55. 



This species of Prion is very plentiful in the South Indian 

 Ocean. I observed it on my outward passage to Tasmania, 

 near the islands of Amsterdam and St. Paul. I never met 

 with it in the South Atlantic, although, in all probability, like 



