A 



SYNOPSIS 



OF TEIE 



FAMILY UNIONISE. 



l!Y 



ISAAC LEA, LL.D., 



VICE-PRESIDEXT OF TUE AMERICAS PHILOSOPHICAL SOCIETY ; 



LATE PRESIDENT OF THE ACADEMY OF NATURAL SCIE.NXES OF PHILADELPHIA ; 



MEMBER OF TnE ZOOLOGICAL SOCIETY OF LOXDOX, ETC. ETC. 



FOURTH EDITION, VERY GREATLY ENLARGED AND IMPROVED. 



PHILADELPHIA: 



HENRY C. LEA 



1870. 



