Petrels from the North-East Pacific Ocean.. 581 



are delicate and weak, and this discrepancy is seen in birds of 

 similar size. 



Since writing the preceding we have referred to the 

 ' Water Birds of North America,' by Baird, Brewer, and 

 Ridgway. This work seems to us to reach the highwater- 

 maik of excellence as regards the systematic portion. In it 

 we find the genera HalocyjAena, Procellaria ( = Hydrobates), 

 Cymochorea, and Oceanodroma recognised, with beautiful 

 coloured figures of the heads and sketches of the bills, tails, 

 and legs, together with careful diagnoses of the genera. 

 The few errors apparent are due to lack of material. The 

 species hornhji is placed in Oceanodroma, as no specimen was 

 accessible. We feel sure, had such been available, we would 

 have been anticipated in its generic separation. 



We will now describe as new a Petrel from the north-east 

 Pacific. 



Cymochorea owstoni, n. sp. 



Adult male. Head, throat, and neck all round dark 

 plumbeous ashy, a small ante-ocular patch darker; the 

 back, scapulars, and rump are practically the same shade. 

 A paler brownish patch is seen on the upper tail-coverts, 

 due to the exposure of these feathers, the tips only being 

 dark, the remainder pale brownish, the concealed bases 

 being quite light. The tail-featliers and primaries are 

 brownish black, the inner webs of the latter being paler 

 brownish. The greater wing-coverts are very pale brownish, 

 forming a distinct bar which is continued on to the bend of 

 the wing, the lesser coverts being also very pale. From the 

 lower neck to the under tail-coverts a uniform sooty-brown 

 coloration prevails, the inner wing-liniug being of this 

 colour. The axillaries apparently are dark ashy grey. No 

 soft parts are noted ; but the bill is black and the legs 

 dark brown, judging from the skin. Culmen 19 mm. ; 

 wing 184 : outer tail-feathers 100 ; central tail-feathers 

 68*5 ; tarsus 28"5 ; midclle toe 27. 



Type, with data "1/5/02, c?, Okinose, Sagami Sea," 

 = Yokohama bay, Japan, in Coll. G. M. Mathews. 



A second specimen, with data " Okinose, Sagami Sea, c?. 



