INV E R 7 ' E BRAT ES . SPONG E S 



'M 



covered. The specimens show cross, longitudinal and oblique sections of 

 the wood finished and unfinished, and the labels on the specimens give the 

 distribution of the species, the characteristics of the wood and its economic 



uses. The trees are grouped by families and the location of each family 



will be found on the floor plan at the entrance of the hall. The reproduc- 

 tions of the flowers, leaves and fruits in natural size are instructive. This 

 work is done in the Museum laboratories. Note the character of forests 

 as shown by the transparencies. [For fuller information in regard to this 

 hall see Guide Leaflet No. 32.] 



SOUTHEAST PAVILION 

 Invertebrates 



Synoptic 

 Series 



At the extreme east is the Darwin Hall, devoted chiefly to the inverte- 

 brate animals (those which do not possess a backbone) and to groups il- 

 lustrating biological principles. Facing the entrance is a bronze bust of 

 Darwin by Wm. Couper presented by the Xew York Academy 

 of Sciences on the occasion of the Darwin centenary in 1909. 

 Passing around the hall from left to right, the progression is 

 from the lowest forms of animal life, the one-celled Protozoa, to the highest 

 and most complex 

 forms of animal life, 

 the Primates, in- 

 cluding man. The 

 distinctive charac- 

 teristics of each 

 group are fully de- 

 scribed on the al- 

 cove and case labels. 

 Many of the minute 

 forms are repre- 

 sented by skilfully 

 prepared models in 

 glass and wax show- 

 ing the animal many 

 times enlarged. 

 Thus the visitor may 

 obtain an idea of the 

 form and structure 

 of these animals 



which in spite of their small size have in so many instances such a vital 

 influence on the life of man. 



European commercial sponge comparable with the Florida ye 

 low sponge or 'Hardhead." The sponge industry in both the 

 Mediterranean and the Bahama region is almost destroyed by 

 careless methods, and conservation must be practiced here as in 

 other of the world's resources 



