He divides them into eleven distinct races, most of which have several sub-races.
RACE I._Pouters_ .-- These are especially distinguished by the enormously enlarged crop, which can be so inflated in some birds as almost to conceal the beak.

They are very long in the body and legs and stand almost upright, so as to present a very distinct appearance.

Their skeleton has become modified, the ribs being broader and the vertebrae more numerous than in other pigeons.
RACE II.

_Carriers_ .-- These are large, long-necked birds, with a long pointed beak, and the eyes surrounded with a naked carunculated skin or wattle, which is also largely developed at the base of the beak.

The opening of the mouth is unusually wide.