of the Neotropical region, ii. [19]

of the Antilles, ii. [75]

conditions favouring development of, ii. [75]

of N. America, ii. [124]

general observations on the distribution of, ii. [522]

richness of islands in, ii. [525]

their mode of diffusion, ii. [525], [528]

comparative distribution of Operculate and In-operculate, ii. [526]

estimated numbers of, ii. [526]

Land-snakes, ii. [382]