8 . 
Murphy's Petrel ( Pterodroma ultima ) 
Three birds believed to be this species were seen on 16 February 
less than 300 miles from the nearest nesting colony. 
The following was recorded in the log sheet " all dark-medium size - 
high arching - straight directional flight - no white seen in wings - 
lighting not good." 
Cook ! s Petrel ( Pterodroma cookii ) 
One Cook f s Petrel was seen on 8 February at 3°09 T S-119°0^ T W. Six more 
were seen on k March and another one on 5 March less than 600 miles off 
the coast of Ba.ja California. Judging from previous specimen records in 
this area, these birds belong to the New Zealand population, although 
it is quite possible that they are in fact members of the South 
American race. 
White-winged Petrel ( Pterodroma leucoptera ) 
One White-winged Petrel on 11 February at 10°^1 T S-119°W. This 
"species" is easily separated from Cook ! s Petrel by the dark head 
(especially the side of the head) which is not concolored with the 
back. 
Leach T s Storm Petrel ( Oceanodroma leucorhoa) 
Leach T s Storm Petrels were the second most abundant species in 
the study area. They were seen on 3^ of the ^2 days of observation 
and occurred as far south as 13°^2 T S. 
All the black, white-rumped storm petrels that were seen closely 
were this species. Generally, the black line through the white rumps 
was used to make this positive identification. 
White-throated Storm Petrel (Nesofregatta albigularis) 
Eight White-throated Storm Petrels were seen between 5°52'S and 
