190 Capt. F. W. Hutton on the Birds seen 



think, therefore probably be only a variety of the other. This 

 bird measures 17 inches across the wings, and 8 inches from 

 the tip of its beak to the end of its tail. 



Thalassidroma oceanica (Kuhl). This bird was seen 

 several times in the northern temperate zone, but not in the 

 tropics. It reappeared again in about 33° S., and continued 

 common until May 2nd, lat. 39° 3' S., long. 33° 9' E., and was 

 then only occasionally seen to May 18th, lat. 40° 40' S., long. 

 88° 39' E., on which date the last was seen. 



Thalassidroma leachi, Temm. ? A specimen of a Petrel 

 about the size of T. pelagica, with head, neck, back, and breast 

 dark slate-blue; upper tail-coverts white; wings, tail, and vent 

 dark brown ; tail forked when closed, square when expanded. 

 This bird was caught on March 9th in lat. 14° N., long. 26° W.j 

 unfortunately the captain of the ship witnessed its capture, and 

 he was too superstitious to allow me to kill it. This bird fol- 

 lowed us through the tropics, and as far, I think, as 36° S. It 

 is probably distinct from T. leachi, as it is very different from 

 the descriptions and figures of Gould, Meyer, and Morris ; but 

 I have never seen a specimen of T. leachi^. 



Thalassidroma pelagica (L.), var. vel sp. nov. ? A 

 variety of this bird, or perhaps a distinct species, was occasion- 

 ally seen in the southern hemisphere south of 35° S. It differed 

 principally in its larger size and in having a few white feathers 

 under the wing. A specimen was obtained in lat. 38° S., long, 

 21° E. ; it measured 14 inches across the wings, and 6*25 inches 

 from the tip of its bill to the end of its tail. 



On the evening of March 26th, lat. 23° 19' S., long. 26° 30' 

 W., a Gannet [Sulci) flew round the ship for several hours ; and 

 on April 22nd, lat. 36° 37' S., long. 16° 33' E., a Tern ( Sterna) 

 appeared. 



Remarks. — During the voyage the following birds were either 

 caught, marked, and let go again, or else some peculiarity was 



* [The bird described by our contributor seems to have very much 

 resembled Proccllaria furcata, Gmel. ; but we never before heard of this 

 species occurring in the Atlantic. — Ed.] 



