24 
ZOOLOGICAL COLLECTIONS. 
[UPPER 
Tables 13-24. Crustacea, such as the Land Crabs of the West 
Indies ; the Hermit Crabs, which live in shells ; the Robber Crab or Tree 
Lobster, which climbs the cocoa-nut trees to get at the nuts ; the Lob- 
sters and Cray-fish ; the Glass Crabs found in the tropical parts of the 
ocean ; the King Crabs of America and the Chinese seas. 
FIFTH ROOM. 
The Wall Cases contain the Ganoid and Cartilaginous Fishes, viz. : 
the Sturgeons of Europe and America, the Polypterus of Tropical 
Africa, and the Bony Pikes (Lepidostens) of the North American 
Freshwaters, covered with scales, hard and polished as ivory ; the 
African Mudfish (Lepidcsiren), with four long threadlike limbs; in 
summer, before the water is dried up, it buries itself in the mud and 
forms a case in which it lies torpid until the rainy season begins ; the 
Earramunda (Ceratodus), a fish hitherto known from fossil teeth only, 
but recently discovered living in Queensland ; the Cartilaginous Fish, 
such as ihe Sharks and Rays ; the Torpedo or Numb-fish, which 
defend themselves by means of an electric apparatus on each side 
of the head ; the Sturgeons of the Russian and American rivers ; 
the long and flat-snouted Polyodon of the Mississippi. On the top 
of the Cases are the saws of various Saw-fish, and specimens of the 
larger Cartilaginous fish, also some of the larger Sponges, such as 
Neptune's Cup. In the Table Ca? ' * are exhibited various kinds of 
Sponges which belong to an extensive class of mostly microscopic 
beings. 
ALBERT GUNTHER. 
