Fig. 2. View of the upper part of the Tulip Balanus.
Fig. 3. View of the base.
Species of oyster, nearly similar to the common oyster, (Ostrea edulis,) and of the Huître cuilier, (Ostrea cochlear,) their shell rather fragile, almost without lamellæ; upper valve concave, colour rather deep violet, form variable.
"Besides these three kinds of Molluscæ, of which the number was considerable, several species of calcareous polypi were found; but those which could be obtained were too imperfect to allow of their being correctly described.
"The iron which was used to protect the copper on the bottom of the Constance frigate having been subjected to chemical analysis, the following are the results.
"This iron, which was in small fragments, very friable, little attracted by the loadstone, soft to the touch, and soiling the fingers like plumbago, gave out in rubbing it a very strong smell, very much like that of burnt linseed oil. Its colour on the exterior was a brownish yellow, and its interior a blackish grey, studded with little points extremely brilliant.