i.w i':ini:nir\rh:s. w ixiunv cu-oi rs 4:i 



\'(M-ti'l)rat('s iiu'ludc (he l;ii\i;('sl , most pow crliil ;iii(l most intclli- 



i!;(Mit of auiiuals. 'I'liis ni-oiip culiiuiiatcs in man. wlio still 



Alcove 12 l)(>ars witness to liis clioi-datc anccstrN' in tlic ictcntion 



or ates ^^^ ,^ chonla (cartihiiiiiiious si)iii('), and «;ill clclts durin<i, 



Including . • i- • » i ■ 



Vertebrates enihryonic lit(\ Anionj»; tlicsc^ ancestral tornis ai-<' the 



Ascidians. or Sea-squirts, an onlar^-ed model of wliich is 

 shown in the central case, whih' others are scmmi anion*!; tlie animals 

 on the wharf-{)iles in tlu^ \vin(h)\v ji;r()up. Otiier models in the central 

 case show the develo])ni(Mit of the e^e; of typical vertebrates. 



In tlu^ circular tow(M- alcove in the southeast cormT of the hall 

 is a comprehensive synoptic series of stony corals. 

 Central cases in this tower and at its entrance sliow 

 unusuall>' large specimens, while a magnificent example of madrepore 

 coral six feet in diameter is shown to the rear of the bust of Darwin. 

 The associations of marine life found in the Bahamas are represented 

 by several small groups in the center of the hall. 



Here also four large models show the mosquito, which is the 

 active agent in the spread of malaria. These models 

 vi ^ M ^1 ° • represent the insect enlarged seventy-five diameters 

 Mosquito ^^ ^^ volume four hundred thousand times the natural 



size. The mosquito in its development undergoes a 

 metamorphosis. The model at the left shows the aquatic larval stage; 

 the larvae are the "wrigglers" of our rain-water barrels. The next model 

 is the pupal stage, also aquatic. The third model is of the adult male 

 mosquito, which is harmless, since it never bites man. The fourth 

 model shows the adult female mosquito in the attitude of biting. It 

 is so arranged as to show the internal organs, thus illustrating a typical 

 insect anatomy. In another case is a series of models showing the hfe 

 cycle of the malaria germ in the blood of man and in the mosquito. 

 In several of the alcove windows are habitat groups of inverte- 

 brates illustrating the natural history of the commoner 



in ow ^^^ niore typical animals. 



Groups -^ ^ 



In the Annulate Alcove is shown the Marine Worm 



Group, reproducing these animals with their associates in their natural 

 surroundings, as seen in the harbor of Woods Hole, Mass. The harbor 

 and the distant view of Woods Hole village with the U. S. Fish Com- 

 mission buildings are shown in the background, represented by a colored 

 photographic transparency. In the foreground the shallow w^ater of 

 the harbor near the shore is represented in section to 



anne orm ^^p^^g^ ^^le animal life found on muddy bottoms among 

 Group , ^ , 1, T , . \. . 



the eel-grass, as well as the chimneys oi various worm- 

 burrows. In the lower part of the group a section of the sea bottom 



