Allen & Ginter issued two Quadruped sets in the 1890s. These cards depict, you guessed it, quadrupeds of various sorts. The definition of a quadruped is “An animal having four feet, as most mammals and reptiles; often restricted to the mammals.” Definition courtesy of www.biology-online.org.
The first set (N21) is the standard size of the period, roughly 1 1/2 x 2 3/4 inches, and consists of 50 cards.
The N41 set (also 50 cards) is a larger format, approximately 3 x 3 1/4 inches. The N41 cards show the same picture as the corresponding N21 card with additional designs on the borders.