Kermadec Petrel ( Pterodroma neglecta ): 6+2?. One intermediate and 
five dark-phase birds were all found north of 05 °N with most in the 
Countercurrent region. 
Phoenix/Tahiti Petrel (Pterodroma alba/rostrata ): 10. Primarily 
a bird of the Countercurrent, but one sighting to the south (00°45’N) 
and one to the north (12°3 Vn). 
Murphy Petrel ( Pterodroma ultima ): 2+1 ? s The birds at l4°22 t N by 
ll8°33’W and 01°53’N by 097°33 t W were most likely this species while a 
third at 12 ° 51 n N by 103 ° 36 ’W may have been. 
Dark-rumped Petrel ( Pterodroma phaeopygia ): 2+1?. The two birds 
definitely identified as this species were both in the southeastern part 
of the South Equatorial Current nearest the Galapagos Islands and in 
the coldest waters of the whole area. 
Juan Fernandez Petrel ( Pterodroma externa ); 1,613* The major 
population was centered in the Countercurrent, although some birds were 
found north to lV > 22 , N and south to 03 °S. The vast majority of birds 
were undergoing heavy molt, especially noticable in the outer primaries. 
Of the 27 birds well observed south of the Countercurrent, however, 9^*5 
percent showed no apparent molt. This may indicate that birds south of 
the Countercurrent were late breeding adults or first year birds still 
moving north. Three birds, found between 06° and 07°N and 111° and 119° 
W were definitely the western form (P. £. cervicalis ). 
Black-winged Petrel ( Pterodroma hypoleuca ): 19* These birds were 
definitely the form P. h. nigripennis Greatest numbers were found in 
the Countercurrent, but small numbersvwere recorded north to 1^°27’N 
and south to the Equator. At no time, however, did they overlap the 
distribution of Collared Petrels (See FIGURE 3 )• The Tew individuals 
that were seen in the same water type as Collared Petrels were seen 
on different days. 
Collared Petrel ( Pterodroma leucoptera): 55• These birds were definitely 
the form P. 1. brevipes . Their distribution was primarily throughout 
the South Equatorial Current, although a few were found north to 
05°22 See FIGURE 3 for comparison with the preceeding species. 
Cook Petrel ( Pterodroma cookii ): 101. All but one were recorded 
along the coast of southern Baja California. The one exception, possibly 
a migrant, was found at 03°S by ll8 0 22'W. 
Bulwer Petrel ( Bulweria bulweri ): 1. A single sighting at 07*0VN 
by ll8°35 , W. 
HYDROBATIDAE 
The difficulty in distinguishing between the various members of 
this group -makes it nearly impossible to give a detailed and accurate 
