260 ZOOLOGICAL GEOGRAPHY. [part in. 



Mammalia. — The only forms of Mammalia peculiar to this 

 sub-region are Tlieropithccus, one of the Cynopithecidae confined 

 to Abyssinia ; Petrodromus and Rhynchocyon, belonging to the 

 insectivorous Macroscelididse, have only been found in Mozam- 

 bique ; the Antelopine genus Neotragus, from Abyssinia south- 

 ward ; Saccostomus and Pclomys genera of Muridas inhabiting 

 Mozambique ; Rcteroccphalus from Abyssinia, and Heliophobius 

 from Mozambique, belonging to the Spalacidre ; and Pectinator 

 from Abyssinia, belonging to the Octodontidse. Cynocephalus, 

 Rhinoceros, Camclopardalis, and antelopes of the genera Oryx, 

 Cervicapra, Kobus, Nanotragus, Cephalophus, Hippotragus, Alce- 

 phalus, and Catoblepas, are characteristic; as well as Felis, 

 Hyama, and numerous civets and ichneumons. 



Birds. — Peculiar forms of birds are hardly to be found here ; 

 we only meet with two — Hypocolius, a genus of shrikes in Abys- 

 sinia ; and Balmniccps, the great boat-billed heron of the Upper 

 Nile. Yet throughout the country birds are abundant, and most 

 of the typical Ethiopian forms are well represented. 



Reptiles. — Of reptiles, the only peculiar forms recorded are 

 Xenocalamus, a genus of snakes, belonging to the Calamariid* ; 

 and Pythonodipsas, one of the Dipsadidae, both from the Zambesi ; 

 and among lizards, Pisturus, one of the Geckotidse, from Abys- 

 sinia. 



Amphibia and Fishes.— -There are no peculiar forms of amphibia 

 or of fresh-water fishes. 



Insects. — Insects are almost equally unproductive of peculiar 

 forms. Among butterflies we have Abantis, one of the Hesperidae, 

 from Mozambique ; and in Coleoptera, 2 genera of Cicindelidre, 

 8 of Carabidaa, 1 or 2 of Cetoniidre, and about half-a-dozen of 

 Longicorns : a mere nothing, as we shall see, compared with the 

 hosts of peculiar genera that characterise each of the other sub- 

 regions. Neither do land-shells appear to present any peculiar 



forms. 



The fact that so very few special types characterise the exten- 

 sive area now under consideration is very noteworthy. It justifies 

 us in uniting this large and widespread tract of country as 

 forming essentially but one sub-division of the great Ethiopian 



