1. Pana halecina, Spotted Frog, b. under surface of head, c. under surface of left fore foot, d. under surface of left hind foot, 2. Rana boylii, Boyl's Frog (California), a. b. lateral and under views, c. d. as in preceding, , 3. Rana boylii, Boyl's Frog, young. b. c. as c. and d. in preceding, 4. Rana septentrionalis, Northern Frog (Fort Ripley, Minnesota). a. b. etc, as in preceding, 5. Rana catesbiana, Catesby's Frog. References as in Fig. 2, Suckley, George 1830-1869, Cooper, J. G. James Graham 1830-1902