FATTNA AND FLORA OF THE FAXKLANDS. 341 



The pelagic forms secured on the 12th were not of much 

 interest ; a few specimens of a species of Clausia and a spherical 

 alga, brown in colour, belonging probably to the genus Rdos- 

 'ph(Bra, were all the forms I obtained from several buckets of 

 water dipped from the sea. 



Early on the morning of the 13th, in lat. 19°44'N., long, 

 20° 25' W. we steamed through several streaks of slightly dis- 

 coloured water of a reddish tint, due to the presence of a species 

 of Trichodesmiwn. This alga was spherical in shape, almost 2 

 m.m. in diameter, and differed very much from that species as 

 observed along the coast of South America. 



About this time I made an unpleasant discovery. I had 

 been taking the surface-temperature of the sea since leaving the 

 channel from a hydrant on the deck aft, which I was given to 

 understand descended directly into the sea. Owing to the very 

 high temperature recorded on the morning of the 14th, I made 

 further enquiry, and found that the sea- water which circulated 

 through the vessel was obtained from a pipe which passed through 

 the engine-room, and thence into the sea. The fact of this sup- 

 ply pipe passing through the hot engine-room was sufficient to 

 raise the sea-water at least 5°F. Subseqiiently, all surface 

 temperatures were taken from water dipped by a bucket from 

 the ship's side; care being taken to rinse it well before recording 

 the temperature of a sample. 



The average surface-temperature of the sea from Santa-Cruz 

 to the coast of Brazil was about 76'^r. ; the highest, 79"6"F. being 

 recorded in 0^19' N., 28°50'W. 



In my many numerous gatherings made between Teneriffe 

 and Montevideo various species of Ceratium were most abundant ; 

 but not a single specimen belonging to the genus Peridiniece was 

 secured during the whole voyage. The various species of cope- 

 pods were mostly bright blue in colour ; one small species 

 belonging to the genus Corycceidm formed a prominent object in 

 all my gatherings during the whole journey across the Atlantic. 

 This species was bright blue, and rivalled our English Anomalo- 

 cera Patersonii in brilliancy. Curiously enough, a radiolarian very 

 similar to, if not identical with Acanthometra elastica was very 

 abundant in 0°19' N., 28''50' W. During the evenings of the 



