80 EDWARD A. WILSON. 
CYMODROMA GRALLARIA. 
Procellaria grallaria, Viell. N. Dict. d’Hist. N. xxv. (1817), p. 418. 
Cymodroma grallaria, Baird, Brew. & Ridgw., Water Birds of N. Amer., ii. (1884), p. 419 ; Salvin, Cat. 
B., Brit. Mus. xxv. 1896, p. 366, tbique citata. 
Tuls petrel is to be recognised on the wing mainly by its small size and white belly, 
the chin, throat and tail alone being black on the under part. We obtained no 
specimens, though we saw it on several occasions. On September 18th, 1901, we had 
several in our wake, and again on September 20th we saw them continually dropping 
to touch the water with one foot, steadying themselves while they daintily took their 
minute crustacean food from the surface of the water. At these times their tails 
become much hollowed out on the dorsal surface, so that each half is at right angles 
to the other. 
We saw the bird again on September 24th, 1901 (37° 8. 8° W.) in the South 
Atlantic, and on November 11th, 1901 (52° 8. 127° E.), in the Southern Indian Ocean, 
when a few were following in our wake, but we saw none in the winter months on our 
voyage home, either in the South Pacific or Atlantic. It is said to range generally over 
the seas of the Southern Hemisphere, and northward to the coast of Florida. 
PUFFINUS GRISEUS. 
The Mutton Bird. 
Procellaria grisea, Gmel. Syst. Nat. i. (1788), p. 574. 
Puffinus griseus, Finsch, J. f. Orn (1874), p. 209; Salvin, Cat. B. Brit. Mus. xxv. (1896), p. 386, sbique 
citata. 
MATERIAL IN ‘ DISCOVERY’S’ COLLECTION. 
No. 110, ad. skin, 9. March 24,1904. Laurie Harbour. Auckland Islands. 
Also two specimens in formalin from the same locality. 
Colouring of the soft parts :— 
Bill, wholly black, but with a narrow thread-like white line at the base of the upper bill. 
Tris, very dark brown. 
Legs and toes, black on the outer surface, but lilac or purple on the inner surface. 
Webs, blackish. 
Claws, black. 
Tuts bird we observed in large numbers at the mouth of Laurie Harbour, where it was 
to be seen in immense flocks occasionally in March, feeding upon an orange-red 
Euphausia. Its method of fishing was typical of the shearwaters, as it would suddenly 
drop into the water and disappear with extended wings, appearing shortly after with 
the wings still fully extended to rise and repeat the same manceuvre constantly. We 
saw large flocks of what we presumed to be the same bird in the open sea off New 
