able anatomical
researches among marine invertebrata which he conducted during the
voyage) is very minute, being not more than the 1/24th of an inch in
diameter. It is translucent and of a brownish-white hue. Its aspect is
that of a Turbo in miniature. The whorls are tumid, the spire prominent;
the body whorl is belted by two prominent keels, one of which is
continued on the whorls of the spire: between, above, and below these
keels are transverse membranous raised ridges, which in the central
division of the body whorl are curved forwards. This curvature
corresponds with the projection of the curious incurved claw-like lobe
that proceeds from thc central portion of the lower lip. Towards the base
of the aperture is a second and similar but smaller lobe, below which is
the short but broad and well-marked canal. The entire lip is marginated
by the thickened and reflected peristome. I believe this curious floating
shell will throw some light on the true nature and habits of several
palaeozoic types. It was taken in the towing net, gregarious, in the sea
off Cape Howe, the south-east corner of Australia. Tab. 3 fig. 9. a, b.

CONTENTS OF PLATES OF NEW SHELLS.

Tab. 2.

Fig. 1. Helix brumeriensis.
Fig. 2. Helix franklandiensis.
Fig. 3. Helix inconspicua.
Fig. 4. Helix iuloides.
Fig. 5. Helix divisa.
Fig. 6. Helix yulei.
Fig. 7. Helix dunkiensis.
Fig. 8. Helix louisiadensis.
Fig. 9. Balea australis.
Fig. 10. Pupina grandis.

Tab. 3.

Fig. 1. Helix macgillivrayi.
Fig. 2. Pupina Thomsoni.
Fig. 3. Helicina gouldiana.
Fig. 4. Helicina stanleyi.
Fig. 5. Helicina louisiadensis.
Fig. 6. Ranella pulchra.
Fig. 7. Scalaria jukesiana.
Fig. 8. Macgillivrayia pelagica.
Fig. 9. Cheletropis huxleyi.

...

APPENDIX 6.

DESCRIPTIONS OF SOME NEW SPECIES OF ANNULOSA COLLECTED BY MR.
MACGILLIVRAY DURING THE VOYAGE OF H.M.S. RATTLESNAKE, BY ADAM WHITE,
ESQUIRE, F.L.S., ASSISTANT ZOOLOGICAL DEPARTMENT, BRITISH MUSEUM.

Among the very numerous Insects and Crustacea, collected by Mr.
Macgillivray during the voyage of the Rattlesnake, the following have
been selected for illustration; references to and descriptions of some of
the Diptera, Homoptera, and Hemiptera, collected by him, have appeared in
the Catalogues of the British Museum drawn up hy Messrs. Walker and
Dallas, while the names and descriptions of others will appear in
catalogues in preparation. A fine species of the class Crustacea,
discovered by him, has been de