MISCELLANEOUS. 53 



a relative informs me of an instance in which she 

 was present when a dog that was much afraid of 

 cats shrunk back, and showed manifest signs of 

 fear, on seeing a picture .of a cat, that happen- 

 ed to be upon a low screen in the room of a 

 gentleman upon whom his master was calling, and 

 whom he had accompanied into the apartment. 

 Animals will also sometimes be deceived by re- 

 presentations of what constitutes their usual food, 

 provided it be not prey which is hunted down 

 by the scent.* 



* Humboldt mentions an instance of this in his Travels in 

 America. Speaking of the titi of the Oroonoko (a species of 

 monkey) he says, " It is extremely fond of insects, particularly 

 of spiders. The sagacity of this little animal is so great, that 

 one of those we brought in our boat to Angostura distinguished 

 perfectly the different plates annexed to the Tableau Elementaire 

 d'Histoire Naturelle of Cuvier. The engravings of this work are 

 not coloured ; yet the titi advanced rapidly its little hand in the 

 hope of catching a grasshopper or a wasp, every time that we 

 showed it the eleventh plate, on which these insects are repre- 

 sented. It remained in the greatest indifference when it was 

 shown engravings of skeletons or heads of mammiferous animals." 



But, in a note upon the above passage, he makes a statement 

 confirmatory of what has been said above, as to the general indif- 

 ference of animals to pictures of other animals in cases where they 

 would be ordinarily guided by the nose rather than by the eye. 

 He says, " I shall observe on this occasion, that I have never heard 

 of a picture, on which hares or deer were represented of their natural 

 size, and with the greatest perfection, having made the least im- 

 pression even on hunting-dogs, the intelligence of which appeared 

 the most improved. Is there an example (he adds) well ascer- 

 tained of a dog having recognized a full-length picture of its 

 master 1 In all these cases, the sight is not assisted by the 

 smell." Personal Narrative, (Eng. Transl.) vol. iv. p. 527-8. 



