598 Messrs. G. M. Mathews and T. Iredale on some 



Salvin tliere is practically no difference to be observed, the 

 latter having the head slightly darker as also the wing- 

 coverts, but this may be due to age ; there is slightly more 

 freckling on the sides of the breast^ and the axillaries are 

 darker and the under wing-coverts more splashed with grey. 

 The measurements of Salvin's type are : — Culmen 42, 

 ■wing 300, tail 135, tarsus 49, mid-toe 50 mm. 



The Bonin Island bird in the skin has the bill light horn, 

 the tip darker, while the legs and feet are dirty-yellow, 

 almost uniform, but slightly darker on the outside. 



Another specimen is labelled : — "■ Iwojima, Boniu Island, 

 15th July, 1911. Puffinus tenuirostris Temm." 



Culmen 39, wing 294, tail 137'5, tarsus 49, mid-toe 52 mm. 



This example agrees even more closely than the preceding 

 with the type of Pufinus cuneatus Salvin. 



A third labelled " Iwojima, Boniu Island, 15/7/11, J 

 Pufinus tenuirostris,^' has the culmen 41, wing 296, tail 135, 

 tarsus 47, mid-toe 52 mm., and is very similar to the others, 

 but has less freckling of grey on the sides of the body, an 

 almost pure white uuder-wing and grey axillaries with white 

 tips. 



These two have verj pale legs, scarcely darker on the out- 

 side of the tarsus, while the outer toe shows distinct dark 

 spots on the joints, otherwise little difference in colour. 



One labelled '^ Iwojima, Bonin Is., Aug. 1910, Puffinus 

 tenuirostris (Temm.) " is a most interesting specimen as it 

 is a fully-grown immature bird. It measures : culmen 41, 

 "vving 280, tail 131, tarsus 47, mid-toe 50 mm. The upper 

 coloration is of a greyer tinge throughout, and the feathers 

 of the upper back and under wing-coverts have broadish 

 ■white tips ; all the under parts are faintly but fairly regu- 

 larly freckled with ashy ; the under-wiiigs are white with 

 ashy markings predominating, the shafts of many feathers 

 dark ; the axillaries are dark ashy splashed with lighter 

 ashy ; the bill is dark horn throughout, and the legs and feet 

 are pallid, the outside faintly darker. 



An example marked " Muko Is., of Bonin Group, 

 5/11/1911, Puffinus leucomelas (Temm.),^^ is a young in 

 down; the forehead bare of down, showing greyish brown 



