48 CAPTAIN TUCKEY’S NARRATIVE. 
served, that when they rose in the direction of the wind, 
they could reach a considerable distance, but when against 
the wind, they dropped again almost immediately ; when 
the rise was in an oblique direction to the wind, they some- 
times described a considerable curve, until they got before 
the wind, and this without any assistance from the wings, 
the only movement of these members being at the moment 
of their quitting the water, when they had for a few instants 
a quick fluttering motion. Four different species of these 
fish were taken. 
After passing Cape Palmas and entering the Gulf of 
Guinea, the sea appeared of a whitish colour, growing more 
so until making Prince’s island, and its luminousity also 
encreasing, so that at night the ship seemed to be sailing 
ina sea of milk. In order to discover the cause of these 
appearances, a bag of bunting, the mouth extended by 
a hoop, was kept overboard, and in it were collected 
vast numbers of animals of various kinds, particularly 
pellucid Salpe, with innumerable little crustaceous animals 
of the Scyllarus genus attached to them, to which I think 
the whitish colour of the water may be principally ascribed. 
Of Cancers, we reckoned 13 different species, eight having 
the shape of crabs, and five that of shrimps, and none more 
than a quarier of an inch in Jength ; among them the Cancer 
