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that mine would take large flies, spiders, earwigs, or beetles. 
Their sense of feeling was very acute, for on touching the head 
with a fine hair, they would make the same upward snap with 
their jaws, but after one or two fruitless attempts would refuse for 
a time to try any longer. After the prey was consumed, the 
uneatable parts were brought to the surface and cast to a distance. 
On the 20th June they changed to the pupa state in which they 
were of a dirty white colour. On the 26th July they had become 
of a pearly appearance ; a slight iridescence and a green tinge on 
the tarsi showed their approach to maturity. On the 2nd August 
they emerged in the perfect form, the elytra after exposure to light 
becoming first blue and finally green. — John Lowe, M.D. 
Appendicularia flabellum — LIGHT emitted on being crushed. 
One evening, after examining a specimen of Appendicularia under 
the microscope, I accidentally pressed the cover on the slide, after 
the light had been turned out. I was surprised to see a bright 
blue flash emitted. On repeating the operation with fresh 
specimens, a bright blue spark was given off in every instance from 
the rounded part of the body, which Professor Huxley says is 
occupied by the stomach and liver. 
In Todd’s ‘ Cyclopedia ’ it is stated that a similar bright blue 
light was seen by Smith to be emitted from the brain in a species 
of Cancer found in the Gulf of Genoa. 
Some remarks in Mr. Herbert Spencer’s ‘Principles of Biology,’ 
vol. i., p. 47, have a special bearing on this subject. — J. Lowe, M.D. 
Xote on the Calyx of Pose. A singular feature in the 
fringe of the calycine leaves of the rose was pointed out to me 
many years ago by the celebrated botanist Robert Brown, whom 
Humboldt styles “ botanicorum facile princeps.” Two of the leaves 
are fringed on each side, two have no fringe, and the fifth is fringed 
on one side only. This is due to their arrangement in aestivation, 
and will be found in all perfect roses. Mr. Brown quoted some 
Latin lines which he had found in an old monkish manuscript in 
the British Museum, showing that this peculiarity had not escaped 
notice. They are as follows : — 
“ Quinque sunms fratres uno sub tempore nati, 
Duo barbati, duo sine barbfi creati 
Quintus liabet barbam, sed tantum dimidiatam.” 
John Lowe, M'.D. 
