Leptognathus, [624]

Leptophis, [618];

L. liocerus, [618], [619]

Leslie, on Xenopus, [146]

Leuckart, on classification, [8]

Leydig's duct, defined, [48], [49]

Lialis burtoni, [567]

Limbs, of Amphibia, [26], [27];

Stegocephali, [79], [83];

Eryops, [286];