CAPTAIN TUCKEY’S NARRATIVE. 49 
jJulgens was conspicuous. In another species (when put into 
the microscope by candle light), the luminous property 
was observed to be in the brain, which, when the animal 
was at rest, resembled a most brilliant amethyst about the 
size of a large pin’s head, and from which, when it moved, 
darted flashes of a brilliant silvery light. Beroes, beautiful 
holothurias, and various gelatinous animals were also taken 
up in great numbers. Indeed the Gulf of Guinea appears 
to bea most prolific region in these sort of animals ; and I 
have no doubt but the marine entomologist would here be 
able to add immensely to this branch of natural history. 
As it was found impossible to preserve the far greater 
number of these animals by reason of their delicate orga- 
nization, the spirit of wine dissolving some, and extracting 
the colours of others, and as most of them require the aid 
of a microscope to describe them, a great portion of them 
were lost on us,from the want of a person either to describe 
or draw them from that instrument. 
Light baffling winds from south to $.W. kept us in sight 
of Prince’s island until the 18th, when a hard squall from 
the S. E. brought to our view that of St. Thomas, which at 
day-light on the 19th bore S. by W., distant 19 leagues. We 
were again plagued with light winds for two days off this 
island, when another squall from the S.E. ran us clear of 
H 
