entific accuracy, '_Helix
desertorum_, March 25, 1846.' Being a snail of a retiring and contented
disposition, however, accustomed to long droughts and corresponding naps
in his native sand-wastes, our mollusk thereupon simply curled himself
up into the topmost recesses of his own whorls, and went placidly to
sleep in perfect contentment for an unlimited period. Every conchologist
takes it for granted, of course, that the shells which he receives from
foreign parts have had their inhabitants properly boiled and extracted
before being exported; for it is only the mere outer shell or skeleton
of the animal that we preserve in our cabinets, leaving the actual flesh
and muscles of the creature himself to wither unobserved upon its
native shores. At the British Museum the desert snail might have snoozed
away his inglorious existence unsuspected, but for a happy accident
which attracted public attention to his remarkable case in a most
extraordinary manner. On March 7, 1850, nearly four years later, it was
casually observed that the card on which he reposed was slightly
discoloured; and this discovery led to the suspicion that perhaps a
living animal might be temporarily immured within that papery tomb. The
Museum authorities accordingly ordered our friend a warm bath (who shall
say hereafter that science is unfeeling!), upon which the grateful
snail, waking up at the touch of the familiar moisture, put his head
cautiously out of his shell, walked up to the top of the basin, and
began to take a cursory survey of British institutions with his four
eye-bearing tentacles. So strange a recovery from a long torpid
condition, only equalled by that of the Seven Sleepers of Ephesus,
deserved an exceptional amount of scientific recognition. The desert
snail at once awoke and found himself famous. Nay, he actually sat for
his portrait to an eminent zoological artist, Mr. Waterhouse; and a
woodcut from the sketch thus procured, with a history of his life and
adventures, may be found even unto this day in Dr. Woodward's 'Manual of
the Mollusca,' to witness if I lie.

I mention this curious instance first, because it is the best
authenticated case on record (so far as my knowledge goes) of any animal
existing in a state of suspended animation for any long period of time
together. But there are other cases of encysted or immured animals
which, though less striking as regards the length of time during which
torpidity has been observed, are