IN THE VERTEBRATA. 73 



10. Foster-parentage, including the voluntary assumption 

 and faithful discharge of the duties of others. 



1 1 . Perpetration of practical jokes, and enjoyment of them. 



12. Capacity for deception, including simulation, strata- 

 gem, decoy. 



13. The performance of services useful to man, including 

 fishing, fetching and carrying. 



14. Seeking assistance from man, recognising his power, 

 and assuming his willingness to protect. 



15. Punishment of conjugal and other offences. 



16. Holding of assemblies for specific purposes, implying 

 a knowledge both of time and place. 



17. Development of dramatic talent, involving the taking 

 of different parts. 



18. Laws and order of battle. 



19. Judicial trials and other ceremonials. 



20. Pride in personal appearance or beauty, in their 

 voice, in the admiration they excite. 



21. Coquetry in courtship in the paying and accepting 

 or refusing of love addresses. 



22. Appreciation of the value of amusement, involving 

 efforts by some individuals for the amusement of others. 



23. ^Esthetic taste, including the practice of decorative 

 art and a knowledge of symmetry and effect. 



24. Distinct ideas of danger and safety ; taking the 

 proper means of avoiding the one and securing the other. 



25. Use of intentional provocation by way of insult, chal- 

 lenge, revenge, or punishment. 



26. The use of effort, and, if necessary, of repeated effort. 



27. Making common cause against common enemies, the 

 cause of one becoming the cause of all. 



But, in so large and important a class of animals as 

 birds, there is very great variety in the relative intelligence 

 of different orders, genera, species, and individuals. Houzeau 

 arranges in the order of their intelligence 



1. The Psittacidce, 



2. The Falconidce, and 



3. The Gallinacece. 



Undoubtedly the parrot is entitled to take first rank not 



