esculentus^w\C\^ is used for food in France. Cases ii and 12 con- 
tain the key-hole urchins and sand-dollars, curious flat animals of 
very peculiar growth. In Case 12 are seen the Holothurians, or 
sea-cucumbers, which the people of the Celestial Empire use as 
food. The latter part of Case 12 is devoted to the collection of 
Worms {Branch IV— Vermes), of which the most peculiar are the 
glass model of Serpula and the Bryozoans, or moss animals. 
Case 4.— Several star-fishes of unusual size. Of especial 
interest is the group of urchins (Strongylocentrotus), showing the 
manner in which these curious animals live. 
Case 3.— Principally an alcoholic collection of star-fishes, 
sea-urchins, and sea-cucumbers. Of especial interest are the three 
specimens of the sea-lily {Pentacrinus) in alcohol, and the wax 
model of the devil-fish {Eledone). 
Suspended over the table-cases is a life-sized model of the 
largest known Octopus, or devil-fish. 
HALL 25. 
HIGHER INVERTEBRATES. 
Entrance from Hall 24. 
Case 13.— The last order of the Worms, the Brachiopods, or 
lamp-shells. Following these is the first order of the Sub-kingdom 
Mollusca, The collection begins with the lowest forms of these 
animals, known as clams. Of special interest in this case are 
pieces of wood bored by the Ship-worm, or Teredo, and a piece of 
massive stone pierced by the Pholas, At the right hand end of 
this case is seen a clam with its siphon or snout fully extended. 
Case 14. — Collection of round-clams, or quahaugs. 
Case 15.— Collection of the fresh-water clams of the United 
States, with a few representatives from foreign countries. Of 
especial interest are the fresh-water clams from Japan, showing 
the manner of artificially producing pearls. 
Case 16. — Continuation of the fresh-water clams and the 
mussel family. Note the glove, cap, and muff made from the 
bissus of the Pinna, 
