. The geography of mammals. ix humboldti) ofUpper Amazonia (Fig. 12, p. 64) of which Mr. Bates haswritten us an excellent account in his well - known Naturalist on the Amazons. Summarising these statements, we find that the Neo-tropical Region is characterised by the exclusive possessionof no less than ten families of mammals, namely:— Bradypodidse (Sloths); Caviidae (Guinea-pi£ Myrmecophagidse (Ant-eaters) ; Solenodontidse (Solenodonts); Chinchillidae (Chinchillas) ; Phyllostomatidse (Vampire bats) ; Dasyproctidaa (Agoutis) ; Hapalidae (Marmosets); Dinomyidse (Dinomys) ; Cebidee (Capuchin mon
. The geography of mammals. ix humboldti) ofUpper Amazonia (Fig. 12, p. 64) of which Mr. Bates haswritten us an excellent account in his well - known Naturalist on the Amazons. Summarising these statements, we find that the Neo-tropical Region is characterised by the exclusive possessionof no less than ten families of mammals, namely:— Bradypodidse (Sloths); Caviidae (Guinea-pi£ Myrmecophagidse (Ant-eaters) ; Solenodontidse (Solenodonts); Chinchillidae (Chinchillas) ; Phyllostomatidse (Vampire bats) ; Dasyproctidaa (Agoutis) ; Hapalidae (Marmosets); Dinomyidse (Dinomys) ; Cebidee (Capuchin monkeys) ; and by the presence of about 130 genera, of which about103 are restricted to its boundaries. On the other hand, when we compare the fauna of the 1 One species, Macrotus californicus, has wandered as far north asCalifornia. 64 THE GEOGRAPHY OF MAMMALS Neotropical with that of other regions, the deficiencies or lipotypes are manifestly considerable. For example,the following ten families of mammals, all fairly well. Fig. 12.—The Barrigudo.(Lagothrix humboldti.) spread over the rest of the world except Australia, areentirely absent from this region:— Bovidse (Oxen).Equidse (Horses).Elephantidse (Elephants).Lagomyidse (Pikas).Viverridse (Civets).Talpidse (Moles). Pteropidse (Fruit-bats).Lemuridse (Lemurs).Cercopithecidae (Old World monkeys).Simiidae (Anthropoid apes). THE NEOTROPICAL REGION 65 Section III.—Subdivision of the NeotropicalRegion The divisions of the Neotropical Region, as based on aconsideration of the class of birds (8), are six in number,namely:— 1. The Antillean Sub-region, containing the Greaterand Lesser Antilles, exclusive of Tobago and Trinidad. 2. The Central-American Sub-region, containing allthat part of the whole region that is north of Panama. 3. The Colombian Sub-region, containing Trinidad andthe slopes of the Andes, through Venezuela, Colombia,Ecuador, and Peru, into Bolivia. 4. The Amazonian Sub-region, embracing the wholewatershed o
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