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did not Bee any of the long fronds of the C. Scalpelli formii 
bo abundant in Port Louis Harbour. In the Pacific archi- 
pelagoes several species of Caulerjpa are eaten, and the green 
fat of the Turtle is said to hr owing to the semi-gelatinous, 
blight green endochrome conuiuiing starch grains mixed with 
oily particles, that fills the fronds of all Caulerpas. I picked 
up a branch of Turbinaria, but it appeared much coarser than 
the ornata at Mauritius. The cup like tips of the fronds were 
filled with the pretty little coralline parasite, Jania antenina 
its pink colour having the effect of a flower, it was in such 
masses that it was very umicult to kuow which was the ori- 
ginal plant. This however was not the only parasite that had 
adopted the Turbinaria us a home. I was waiting for the rest 
to return to the boat and sat down under a cocoanut tree to 
examine the plant with my j lass. Some of the fronds were 
covered which appeared to be a disease, to the naked eye, but 
on close inspection, proved to be minute Lepralia or sea scurf 
as it has been called, a s:>rt of congeries of egg-shaped cells 
of calcareous matter, but as the Turbinaria bad been long out 
of water of course I did not see the polyps. Under it on the 
rock lay a delicate Hydatina physis, with its animal still 
alive. It is worth a walk to the sea shore to see this beautiful 
creature, and if any one in Mauritius possesses an Aquarium 
I would recommend the owner to procure oue as soon as 
possible, as it bears confinement well. The colours are 
a lovely buff and sky blue, and when it outspreads its dia- 
phanous mantle as it will do on the hand, it is a most interest- 
ing object. Bits of Flustrn 8 lav about, shewing how rich in 
Marine plants these seas are, and I wished I had a longer 
time to remain, to examine the reefs and shore. Oue bit, I 
snatched up in haste and pocketed, prove to be on examina- 
tion a pretty Sertularia growing on a Flustrn Foliacea. 
“The Corvette was lying off and on about three quarters of 
a mile away, not daring to approach nearer, but the whale 
boat that brought us to shore was to -sing up and down like 
an egg" shell, not at all to the inconvenience of the men who 
lay half asleep in her. As'we embarked, a wave broke over 
the boat and gave us a thorough wetting. Mr Savy accom- 
