n both North and South-eastern provinces, in depths
between twenty-seven and forty-five fathoms, give a slight idea of the
fauna of this important region. In the South-eastern province we find in
forty and forty-five fathoms on a muddy bottom in Bass Strait, Turritella
sinuata, Trochus nebulosus, a Pleurotoma, an Emarginula, a Dentalium, two
species of Cardita, a Cypricardia, a Venus, a Nucula, and Pectunculus
holosericeus. In the North-eastern province we find off Cumberland Island
in 27 fathoms, also on a muddy bottom, species of Murex, Nassa,
Turritella, Ranella pusilla, a Fusus, Cancellaria antiquata, a Terebra,
two Dentalia, a Natica, a Terebellum, a Scalaria, a Cardium, a Venus, a
Nucula, a Pecten, and a Spondylus.

It is evident from the comparative paucity of undescribed species
procured in the Littoral zone and the large proportion of new or doubtful
forms among those taken by the dredge, that a rich harvest has yet to be
reaped in the deeper regions of the southern seas. In the lower zones,
however, just as much as in the upper, the distinctions of province are
maintained. The explanation of this complete separation of the
South-eastern marine fauna of Australia from that of the North-eastern or
Indo-Pacific portion, may be explained by reference to the distribution
of currents along the Australian shores. In both, as in the Bathymetrical
regions of the South Atlantic, the Testacea of the depths are generally
smaller and less brightly coloured than those inhabiting the shallows.

During this voyage notes of the habitats of considerably more than a
thousand species of Mollusca and Echinodermata were carefully registered.

2. ENUMERATION OF TERRESTRIAL PULMONIFEROUS MOLLUSCA AS YET NOTICED IN
AUSTRALIA.

The following Catalogue is founded on the monograph of Helicidae by Dr.
Pfeiffer. To the species therein described are added certain new ones,
announced by Pfeiffer since the publication of his work, and others,
recorded for the first time in this volume. It will be seen that a great
part of the Australian land-shells is as yet unfigured. The exact
localities of not a few have to be determined; a precise record was kept
of the place and circumstances under with each was found during the
voyage of the Rattlesnake. From all we yet know the genus Helix is fairly
represented in New Holland, and presents some very remarkable and
peculiar forms; Bulimus has but few, and those (with the sole exception
of B. atomatus