——, on reciprocal crosses, [258].

——, on crossed maize and verbascum, [270].

——, on comparison of hybrids and mongrels, [272].

Geese, fertility when crossed, [253].

——, upland, [185].

Genealogy important in classification, [425].

Geoffroy St. Hilaire on balancement, [147].

—— —— on homologous organs, [434].

—— ——, Isidore, on variability of repeated parts, [149].

—— ——, on correlation in monstrosities, [11].