42 



IXVERTEBRATES. CRUSTACEAXS AXD INSECTS 



common lobster, also enlarged models showing heads of various 

 species of insects. On the wall are the two largest 

 specimens of lobster that have ever been taken. They 

 weighed when alive thirty-one and thirty-four pounds 



Crustaceans 

 and Insects 



Marine Habitat GrouiJ. A comnuiiiity of starfishes 

 below the edge of a coral reef in the Bahamas. 



sea anemones, sea unhins and sponges as seen 



respectively. The large.st of the arthropods is the giant crab of Jaj^an, 

 which, like that placed on the wall, may have a spread of about ten 

 feet. The main exhibit of insects is displayed on the third floor. 

 The mollusks form a group second only to the arthropods in the 

 vast number and diversity of forms which it emljraces, 

 including marine, fresh-water antl land animals. All 

 mollusks have soft bodies, but nearly all of them secrete 

 a shell which in many species is of pearly material (mother- 

 of pearl). Well-known examples of this group are the 

 conniion clam and oyster and enlarged models in the 

 center case show the anatomy of these species. A large 

 collection of mollusks is shown on the third floor. 



Alcove 11 

 Mollusks 



Models of 

 Clam and 

 Oyster 



