186 Dana on the position of Amphibians among Vertebrates. 
reasonable to infer that the egg which was to be developed when 
bathed in water should thus differ somewhat from one that was 
ustrated also in the following article in the same volume 
(Article I, On the Classification of animals based on the principt 
of Cephalization) by a wider range of analogies, showing tha 
similar hypotypic groups constitute the lower subdivision ™ 
several departments of the animal kingdom. 
