Bui,. U. S. B. F., 1908. 



Pl,ATE CXV 



Fig. 3. — Reflecting water glass used by the writer. For description see text. Compare figure 4, text. 



Fig. 4.— Male ot the common shiner {Notropis cornultti ), photographed 

 in an aquarium out of doors with a reflecting camera. 



