Thelphusa _Indica, Latr_.

_Cardisoma_ ... ?

Ocypoda ceratophthalmus, _Pall_,
_macrocera, Edw_.

Gelasimus _tetragonon, Edw_.
_annulipes, Edw_.

Macrophthalmus _carinimanus, Latr_.

Grapsus _messor, Forsk_.
strigosus, _Herbst_.

Plagusia depressa, _Fabr_.

Calappa philargus, _Linn._
_tuberculata, Fabr_.

Matota victor, _Fabr_.

Leucosia _fugax, Fabr_.

_Dorippe_.

DECAPODA ANOMURA.

_Dromia_ ... ?

Hippa Asiatica, _Edw_.

Pagurus affinis, _Edw_.
_punctulatus, Oliv_.

_Porcellana_ ... ?

DECAPODA MACRURA.

Scyllarus _orientalis, Fabr_.

Palinurus ornatus, _Fabr_.
affinis, _N.S._

_Crangon_ ... ?

_Alpheus_ ... ?

Pomonia inflata, _Edw_.

Palaemon carcinus, _Fabr_.

Steaopus ... ?

Peneus ...?

STOMATOPODA.

_Squilla_ ... ?

Gonodactylus chiragra, _Fabr_.

_CIRRHIPEDIA_.

_Lepas_.

_Balanus_.

_ANNELIDA_.

Tubicolae.

Dorsibranchiata.

Abranchia.
Hirudo _sanguisorba_.
_Thwaitesii_.
Haemopsis _paludum_.
Haemadipsa Ceylana. _Blainv_.

Lumbricus ... ?

* * * * *

NOTE

ON THE FACULTY OF REPEATED RE-VIVIFICATION POSSESSED BY THE _ROTIFERA_,
ETC.

The _Rotifer_, a singular creature, although it can only truly live in
water, inhabits the moss on house-tops, dying each time the sun dries up
its place of retreat, to revive as often as a shower of rain supplies it
with the moisture essential to its existence; thus employing several
years to exhaust the eighteen days of life which nature has allotted to
it. These creatures were discovered by LEUWENHOECK, and have become the
types of a class already numerous, which undergo the same conditions of
life, and possess the same faculty. Besides the _Rotifera_, the
_Tardigrades_, (which belong to the _Acari_,) and certain paste-eels,
all exhibit a similar phenomenon. But although these different species
may die and be resuscitated several times in succession, this power has
its limits, and each successive experiment generally proves fatal to one
or more individuals. SPALLANZANI, in his experiments on the _Rotifera_,
did not find that any survived after the sixteenth alternation of
desiccation and damping, but paste-eels bore seventeen of those
vicissitudes.

SPALLANZANI, after thoroughly drying sand rich in _Rotifera_, kept it
for more than three years, moistening portions taken from it every five
or six months. BAKER went further still in his experiments o