Bull. U. S. F. C. 1 S90.— (To face page 72.) Fishes from the Lower Potomac River. 
Plate XIX. 
Fundulus MAJALIS. Mayfish. Young. Four times natural size. 
FUNDULUS DIAPHANUS. Spring Minnow. Male. One and one-fifth times natural size. 
FUNDULUS DIAPHANUS. Spring Minnow. Female. One and one-fifth times natural size. 
FUNDULUS HETEROCLITUS. Common Killifish. Male. Natural size. 
