FLOOR. J 
FOSSILS. 
179 
A portion of Case 15 is occupied with the Polyzoa, horny coral- 
lines, most of which are found in the sea, encrusting shells and stones ; 
and which are now considered to be more nearly related to certain low 
forms of Mollusca (the Tunicata) than to the Zoophyta. 
The remainder of the Case is occupied with Nummulites (Fora- 
minifera); numerous examples are exhibited of these small chambered 
shells, which resemble Nautili and Ammonites in form, but are con- 
structed by creatures of a more simple organization. The larger sorts 
are most abundant in the Older Tertiary rocks (" Nummulitic lime- 
stone") of Europe, Africa, and India, — such as that of which the Great 
Pyramid is built. 
Two instructive series of enlarged models of these, for the most 
part, microscopic forms, are placed in this case : one series by M. 
D'Orbigny, the other by Drs. Keuss and Fritsch. 
Stone Lilies (Crinoidea). In Cases 18 and 19, Room V., and the 
adjoining Window-recess Case, is a series of these once abundant forms 
of stalked Star-fishes, now so exceedingly rare in a living state. They 
are represented by forms from the Silurian, Carboniferous, Liassic, 
Oolitic, and Cretaceous formations. The most noteworthy are the 
Crotalowinus rugosus, from Dudley; the group of heads of Pentacrinus 
briareus, from Charmouth, Dorset; the series of Lily Encrinites 
(Apiocrinus Parkinsoni), from Bradford ; and of Marsupites Milleri, 
from Kent and Sussex. 
In the Window Case, between Table Cases 16 and 17, is arranged a 
series of Fossil Star-fishes from the Silurian, Oolitic, Cretaceous, and 
Tertiary rocks. 
Sea-urchins {Echinidce). Case 22, Room VI. These are arranged 
in four principal groups. 1. Those from the Tertiary strata, of which 
the most remarkable are the large Clypeasters from Malta. 2. The 
Chalk Echinidce, amongst which are the Helmet-urchins (Ananchytes), 
popularly known as "fairy-loaves;" the Heart-urchins (Spatangidce), 
called "fairy-hearts;" and numerous species of Cidaris, provincially 
termed "shepherd's crowns;" some of the specimens have spines 
still attached to the shell. 3. The Jurassic or Oolitic Echinidce, and 
the Sea-urchins from the Trias and older rocks, which include many 
singular forms of the spines or locomotive organs. 
Worms {Annelida). One half of Case 14, Room V., is occupied 
with examples of the tubes, or shells, of fossil Annelids (Serpidce). 
One species, known as the Vermicularia Bognoriensis, makes an almost 
regularly convoluted tube, like a snail-shell ; a mass composed of these 
tubes is placed in this Case. 
Fossil Insects (Articidata). The other half of Table Case No. 14, 
Room V., contains the Insect remains, consisting of the wing-covers 
(elytra) of beetles from the Oolitic strata of Purbeck and Stonesfield, 
and Dragon-flies (some in their larval state), from Solenhofen and 
CEningen. There is a wing of a large flying insect, resembling the 
living Corydalis of the United States, in a nodule of clay-ironstone 
from Coalbrook Dale ; also an Insect allied to the Mantis, named 
Lithomantis carbonarius, and an Arachnid Eophrynns JPrestvicii. both 
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