51�Թ�

The division of Vertebrata in which no allantois is developed.

The class of Vertebrata that includes the birds. µ Aves, or birds, have a complete double circulation, oviparous, reproduction, front limbs peculiarly modified as wings; and they bear feathers.

Fowls are classed by modern naturalists as follows: Division.  Vertebrata—possessing a back bone.

Causes due to animals—Vertebrata—Wounds, etc.—Invertebrata—Insects, etc.—Plants as causes of disease—Phanerogams, weeds, etc.—Cryptogams, fungi—Epidemics, etc.

Partial catalogue of the cold-blooded Vertebrata of Michigan.