57 
swallow; the nest of the tailor-bird, &;c. On the roomviii. 
lowermost shelf is deposited the supposed leg of the NA^insT. 
Dodo, &c. 
Tables \A to 30 contain the shells of mollus¬ 
cous animals (arranged according to the structure 
of their inhabitants); the greatest portion of which 
were left to tlie Museum by the Rev. C. M. Cra- 
cherode. Amongst these are, 1. Molliisca gaste¬ 
ropoda, or univalve shells ; amongst these are, 
first, various land shells whose animals have four 
feelers or tentacula, such as the tomiger or grin- 
ning-snail, whose mouth is turned upwards: the 
polydontes or many-toothed snail; snails properly 
so called; achatina; bulimus; bulimulus (amongst 
which is the three-banded species from the West 
Indies, that occurs imbedded in the rock inclosing 
the fossil human skeleton in Room IX.); clauselia, 
v/hose animal has an internal operculum or lid: 
secondly, those land, freshwater, and sea-shells, 
with an elevated spire, Vvhose animals have but' 
tw’o feelers and no lid, such as planorbis; limneea 
or marsh-snail; janthina or violet-shell, so named 
from the beautiful colour common to all the 
species; physa or floating-snail; auricula or ear- 
snail, and carychium: thirdly, those land, fresh¬ 
water, and sea-shells, wdiose animals have two 
feelers and a lid, such as cyclostoma; paludina 
or marsh-shell,' which produces its young alive; 
clitho'n or spiny-nerite; netitina or water-netite; 
nerita or sea-nerite; nautica; trochus or wdieel- 
shell; 
