570 COLUBRID^E. BOID^E. 



limekiln. The length of this species is usually between three 

 and four feet ; in tropical countries, however, the Colubers 

 attain a much greater size. The family ColubridaB includes 

 many species which habitually reside among trees ; and these 

 are, for the most part, distinguished by the brilliancy of their 

 colours, and the gracefulness of their forms and movements. 

 They are harmless and very tameable. One species belonging 

 to this family, the Acrochordus, or Oular Carron of the Java- 

 nese, is remarkable on account of its diet ; which (contrary to 

 the general habit of the order) seems to consist chiefly or 

 entirely of fruits. 



508. Whilst the Colubridas are very widely distributed, 

 some species being found in almost every part of the world, the 

 BOID^E are restricted to tropical climates. They are Serpents of 

 very large size and enormous muscular strength ; and from their 

 power of coiling round and firmly compressing the bodies of 

 their victims, they are able to overcome animals of the largest 

 dimensions. The tail has great prehensile power ; and is much 



FIG 239, BOA CONSTRICTOR. 



aided in its grasp, by two hook-like claws sheathed with horn, 

 which are supported upon bones that obviously represent those 



