ZOOLOGY. 561 



and through this the abdominal limbs are left only, as 

 thin and dry poles or staffs. 



3412. From the same cause the muscular flesh upon 

 the head has disappeared. Neck and head are lean, or 

 like Insect horn, which serves only the nervous system. 



3413. Beyond the excess of motion the sense of feeling 

 has been nearly lost. The toes are simply destined for 

 motion, and to be used as scrapers, and the digits have 

 become the supports of feathers. 



3414. The bill is an Insect's proboscis. In the Bird 

 no teeth whatever project from the flesh, but the jaws 

 themselves. To such an extent has the flesh been with- 

 drawn. What has been called the cere is the only rem- 

 nant of the facial flesh. Even nostrils and tongue have 

 suffered ossification. 



3415. The tongue is a feather. Saliva is scarcely 

 present. 



3416. The ears, as being the sense of motion, are far 

 more perfectly evolved than in all the preceding classes. 

 They have opened outwards, and possess an additional 

 auditory part, the cochlea. 



With the limbs the sense of hearing must of necessity 

 grow perfect. 



3417. The Bird is thoroughly, or "out-and-out" 

 organized as an animal of song. In it Nature attains 

 unto a definite hearing and speech. The Bird speaketh 

 the language of Nature. 



With the Bird, the voice, properly speaking, breaks 

 forth for the first time, and that too in a high grade of 

 perfection, as melody. 



3418. The ear is the highest representation of the 

 trachea in muscles and bones. The Bird is the Otowon. 



Sexual Parts. 



3419. The kidneys are symmetrically constructed, 

 although not yet a perfectly coherent mass. They are of 

 very large size. But a strange feature has come to pass 

 in the urinary bladder, which is the sexual lung. Into 

 this, as has been already said, the intestine opens, and 



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