^ 



^'^} v-z— /s' zii-ii-i^ ■ 



A 



SYNOPSIS 



FAMILY UNIONID.E. 



BY 



ISAAC LEA, LL.D., 



VICE-PRESIDENT OF THE AMERICAN PHILOSOPHICAL SOCIETY ; 



LATE PRESIDENT OF THE ACADEMT OF NATURAL SCIENCES OF PHILADELPHIA ; 



MEMBER OF THE ZOOLOGICAL SOCIETY OF LONDON, ETC. ETC. 



FOURTH EDITION, VERY GREATLY ENLARGED AND IMPROVED. 



PHILADELPHIA: 



HEJS^EY C. LEA. 



1870. 



