PLAT i. VI 



It 



1, Head of Spectacled Petrel (Proccllaria conspicillata). 2, Head of White-chinned Pctivl 

 (Procettaria cequinoctiali*). 3, 4, 5, Head, top of bill and leg of Diving Petrel (Pelecanoides 

 urinatrix). 6, 7, Side and top of bill of Thin- billed Prion (Hderoprion belehcri). 8, 9, Top view of 

 bill and leg of Dove Prion (H. desolatus maltingleyi}. 10, 11, Top and side of bill of Fairy Prion 

 (Pseudoprion lurtur crassirostris). 12, 13, 14, Top views of bills of Broad-billed Prion (Pachyptila 

 vittata vittata, P. v. missus, P. v. gotildi.) 



