46 
WEST WING. 
mens in tlie gallery are the stalked Crinoids, which were 
collected by the " Challenger," and one found attached to an 
old telegraph wire which was taken up in the Caribbean Sea. 
These deep-sea forms, so abundant in earlier periods of the 
world's history, are exhibited on tables in the corners of the 
gallery, by case 7.* 
The wall-cases contain types of the very various and different 
groups which are put together as Worms or Yeemes. Case 1 con- 
tains the Tape-worms or Cestoda, and the Flukes or Trematoda, 
the life history of a type of each being illustrated by specimens, 
figures, and models ; in case 2 the Eound- worms are illustrated 
by models of Trichina, and the anatomical structure of various 
other forms is shown by the aid of diagrams. Case 3 contains 
the free-living Terrestrial and Marine Worms, the Leeches, and 
Gephyreans. Case 4 is devoted to specimens of Echinodermata 
preserved in spirit, especially Holothurians, or sea-slugs and 
sea-cucumbers. 
Gallery. Y. A large gallery is devoted to the extensive division of 
MoLLUSCA, the exhibition of which is however mainly re- 
stricted to their shells. In some cases the form of the animal 
itself is shown either by specimens in spirit or by means of 
models. 
The collection, at present under rearrangement, is contained 
in four parallel rows of table-cases, the arrangement commenc- 
ing on the right as the gallery is entered. The first two rows 
contain the marine forms of Gastropods — a division which 
includes Snails, Slugs, Whelks and all those Molluscs which 
crawl upon the under surface of their bodies. The Cones, 
Volutes, Mitras and Murices are some of the most attractive 
groups. The two rows of cases on the left contain the land- 
shells, Bivalves and Cephalopods. The Cockles, Oysters, Clams, 
Piddocks, Teredos, Scallops and Ark-shells represent some of 
the principal types of Bivalves, so called on account of their 
shells being formed of two pieces or valves. A Giant Clam on 
the floor of the gallery weighs 310 lbs. The Argonauts, the 
beautiful pearly iS'autilus, the Octopus, Squids and Cuttlefishes 
are the chief kinds of Cephalopods. 
* • Guide to the Shell and Star-fish Galleries (Mollusca, Echinodermata, 
Vermes).' Price fourpence. 
