20 EINAR LÖNNBERG, REPTILES. 



cognizable on the absence of this characteristic, and of the white ventral stripe. It 



is, liowever, very difficult to express any definite opinion based only on one specimen. 



Ch. ajfinis is known from Abyssinia: Shoa and Harar, and from Gallaland. 



Chamseleoii jacksoiii Blgr. — Plate 1, Fig. 1, 2. 

 Wekxek: Prodr. Monogr. Chamseleon, Zool. Jahrb. Syst., Bd. 15, p. 403. 



In the surroundings of Meru borna this Chameleon was very plentiful and a 

 eonsiderable number of specimens was procured. As a rule the males were much 

 larger than the females. The two largest had the following dimensions: 



From end of snout to extremity of casque 51 mm. 43 mm. 



» » » » commissure of mouth 33 » 29 » 



From commissure of mouth to extremity of casque .... 33 » 29 » 



Height of body raidway between före and hindlegs .... 53 » 53 » 



From snout to veut 150 1 » 151 » 



From vent to tip of tail 170 » 150 » 



Both these specimens are larger than those previously recorded. 



The nasal horn of the male measures 36 and the ocular horns about 34 mm. 

 in this male. The head and the dorsal crest were generally yellow b ut otherwise 

 Jackson's Chameleon is green. 



This species is quite a good walker on the ground and ascends with great ease 

 the trunk of a thick tree. 



Ophidia. 



The unfavourable climatic conditions have still more influenced the colleetion 

 of snakes than that of lizards. Ten species of snakes cannot, of course, give any 

 true picture of the ophidian fauna of the conntry through which the expedition went. 

 There are, however, also from a zoogeographical point of view some interest connected 

 with this colleetion. The greater number of the species are very widely distributed 

 över the Ethiopian continent viz. Python sebce, Chlorophis irregularis, Leptodira ho- 

 tamboeia, Psammophis sibilans, Causus rhombeatus, and Bitis arietans. Except Causus 

 rhombeatus, all these are found in Sudan as well and that is also the case with the 

 following three more species viz. Naja haie — which Werner regards as palearctic, 

 although it is found from Egypt to Mozambique — Psammophis biseriatus wich latter 

 is distributed from Sudan and Somaliland southwards through German East Africa, 

 and Zame?iis florulentus. The discovery of this last species in British East Africa, 

 although in its northern parts, north of Guaso Nyiri is as well interesting as unexpec- 

 ted. Before this it has not been found south of Sennaar according to John Anderson. 2 



1 The body is somewhat curved. 



8 Zoology of Egypt, Vol. 1 Reptilia, p. 257. 



