438 



Mr. N. Kurodii on the 



[Ibis, 



nortliern Pucitic Ocean, including the Coniniander nnd Kuril 

 Islands, appear to be slightly darker than those from the 

 north Atlantic Ocean, bnt this is probably due to the age of 

 the specimens rather than to any subspecific difference. 



I have examined only one specimen, which was obtained 

 in one of the Kuril Islands, May 19iy. 



Measurements of the specimen : — 



Loc. 



Matsudiiira's Kuril Is. 

 Coll. No. 

 14325. 



Exposed! xiTT. 

 / : Wing. 



16 mm. 



IfiO 



Tail. 



Tarsus. 



Mid. toe Deptli of 

 land claw. I tail-fork. 



74'5 (lateral; 

 59 (central) 



20 



26 



17 



Oceanodroma castro (Harcourt). 



Thalassidroma castro Harcourt, Sketcii of Madeira, 1851, 

 p. 123 : Madeira. 



The Madeiran Fork-tailed Petrel, often called the Hawaiian 

 Petrel, has a very wide range, extending from the Atlantic 

 to the Pacific. It is recorded from the Atlantic Ocean 

 as a breeding bird *, and was obtained on Kauai Island, 

 Hawaiian group, and described by Uidgway t under the 

 name of <'i/inocho)'i\i cri/pfoleurura ; it is not yet r9Cord?d 

 from Japan. 



Viscount Matsudaira, however, obtained an adult specimen 

 of the species, which was captured in the Kiver Daiyagawa, 

 Nikko, Prov. Shimotsuke, C Hondo, Japan, in November 

 1906. This specimen agrees well with the description and 

 plate of Godman's ' Monograph of the Petrels' (vol. i. p. 15, 

 pi. 5). It is a l)lacker and smaller bird than the preceding 

 species, leurorrhoa, and has distinct, broad, black tips to 

 the white u[)per tail-.overts. The outer tail-feathers have 

 a white patch to their bases. The depth of tail-fork is only 

 7 mm. instead of 17 mm. It is no doubt a strajitiler from 

 sea-coast to the mountainous river where it was captured, 

 and is the only record of the species obtained in Japan. 



* Godiuan, I.e. i. p. IG ; Hartert, /. c. ii. p. 1415. 

 t Ridgway, Proc. U.S. Nat. Mus. iv. 1882, p. 337. 



