1066 MR. CYRIL CROSSLAXD OX 



camels never get beyond this stage, and however hungry hold their 

 heads in the air above the pile of corn, crying like spoiled children 

 until the owner comes to feed them. 



Contrast with this the behaviovir of my two tame gazelles. From 

 six weeks old to maturity they fed on milk, corn, and occasionally 

 native leguminous plants. When fully adult they were introduced 

 to bread, sweet biscuits, sugar, green corn-stalks, and the leaves of 

 Acacia tortUis, all of which they ate readily without the stimulus 

 of hunger. I once tried to feed a sink camel on stale bread, by 

 way of invalid diet. It was impossible. 



Another case is rather like tha.t of the pigeons that starved 

 rather than eat a strange seed. I tried to change the feeding 

 place of my fowls by throwing their corn a yard or two to one side 

 of the usual place in the direction of the new one. When called the 

 fowls rushed up, stopped dead at the accustomed spot, and nothing 

 would make t!hem move a foot beyond it. We can pair the fowls 

 with the oj)po8ite case, as we did the camels with the gazelles. 

 The land crab Ocypode makes its burrows a little above high- water 

 mark and never more than a yard or two higher up. But where 

 the camels and fowls were regularly fed, the ground is full of the 

 lioles of these crabs ten or twenty yards above their usual habitat, 

 Alsoj instead of confining themselves to their accustomed diet of 

 dead fish, these lively crabs are ready for a,ny experiment, from 

 sweet biscuits to handkerchiefs, and some must now be living on 

 camel dung and corn. 



There are no oysters in Jerusalem, and consequently a native of 

 that city cannot be persuaded to try one. He has no religious 

 prejudice, or other dislike, but " ISTo, I do not know them " is his 

 sufficient reason. 



II. WARXING CoLORATIOX IX A CHAMUlyEOX, 



I have not seen the fact recorded that the Chameleon [Cluimceleon 

 sp.) can change its colour so quickly as to frighten a dog. While 

 staying in Zanzibar my host's fox terrier showed hostile interest in 

 a chameleon someone had brought into the house. The chameleon 

 invariably tried to run away wlien attacked, but those who knoW 

 the species can imagine the ludicrous ineffectiveness of a chame- 

 leon's flight. In a few seconds the impossibility of escape seemed 

 to reach the animal's brain, when it at once turned round, opened 

 its great pink mouth in the face of the advancing foe, at the same 

 time rapidly changing colour, becoming almost black. This ruse 

 succeeded every time, the dog turning oflf at once. Among the 

 natural leafy surroundings of a chameleon the startling effect of its 

 sudden change of colour would be much greater. Imagine a dog or 

 cat nosing about suspicious of the presence of a live animal, but 

 unable to see anything. Until almost touching him the chame- 

 leon sits close, secure in his mantle of invisibility. Then suddenly, 



