We caught also many small insects, and some shrimp-like animals.
The sea was full of some things resembling hairs, but which broke the moment they were touched.
On this evening we placed a large number of acalepha in a bucket, and on agitating the water it became a mass of phosphorescent light. It is strange that these animals should never emit this light without being irritated.
July 1. South latitude 35 degrees 51 minutes; east longitude 18 degrees 56 minutes; average temperature of water, 65 degrees.
This day many specimens of different kinds were taken; and amongst them a shellfish (Hyalea) the same as that caught on the 13th November 1837, in south latitude 30 degrees 7 minutes; east longitude 100 degrees 50 minutes 10 seconds. This fish today put out the apparatus with which it swam. It consisted of two broad transparent wings, shaped like the first pair of wings of a butterfly, and which it moved in a precisely similar manner. Its shell was of a delicate pale transparent brown colour, with a jet black spot in the centre. (See Illustration 6 volume 1 Figure 1.) We also caught an animal of a precisely similar form and colour with this, but which was not provided with a shell.
The other specimens were:
1. A shell (Janthina)* the same as was caught on November 14 1837, and on several other occasions, with its swimming apparatus attached.
(*Footnote. The corresponding figure, Illustration 9 volume 1, should have been inverted.)
