HOMEWARD VOYAGE. Ill 



miles within the tropics to follow an outward hound 

 vessel. Another petrel much resemhling- it — a new 

 species with longer wings and different marking-s, 

 the head, neck, and upper surface being dark choco- 

 late, and the lower parts white— was abundant be- 

 tween the latitude of 46° and 40° south, and between 

 the parallels of 36° and 36° S., Procellaria consjn- 

 cillata was numerous, but unfortunately I had no 

 opportunity of procuring specimens of either. 



Five days after leaving the Falkland Islands, we 

 encountered a very heavy gale, commencing at 

 south-east, and blowing hardest at east, when the 

 barometer was down to 29.264, — next day the wind 

 went round to the south-west and moderated. From 

 the latitude of the entrance of the River Plate up to 

 lat. 16° S., we experienced northerly winds between 

 E.N.E. and W.N.W., after which we got winds 

 commencing at S.W. and merging into the S.E. 

 trade, which we may be said to have fairly got in 

 13|-° S. lat. and 23^° W. long., and lost in 6° N. 

 lat., and 22° "W- long. We picked up the N.E. 

 trade in lat. 13° N. and long. 24" W. and carried 

 it up to lat. 29° N. and long. 37|^° W. I mention 

 these particulars as the hmits of the trade-winds as 

 experienced by us were considered to differ consider- 

 ably from what was to be expected at this season 

 of the year. Gulf weed made its first appearance 

 in lat. 24° N. and long. 35J° W. but in small 

 quantity, and was last seen in lat. 38° N. and long. 

 33|-° W. in detached pieces, mostly dead. About 



