866* Dynamic Theory. 



the sheep in (late) all right, and one pup in her mouth, and went back 

 after her other puppies one at a time, the last one dead. Instincts cross 

 b} r crossing breeds (same in human beings). 



The dung beetle in sheep districts uses sheep pellets, for the deposit of 

 its eggs instead of making them itself; an adaptation to local circum- 

 stances. Certain ants in a part of Siam, subject to inundation, make 

 their nests in trees. There are cases of bees becoming carnivorous. 

 Wasps are naturally carnivorous. 



The ring plover in Norfolk and Suffolk formerly were shore birds, 

 but the sea having receded several miles, the birds have remained 

 where they were, and changed their habits to correspond. Cattle in 

 Africa and United States have been known to suck bones, from which 

 a carnivorous habit might possibly arise. Probably the Pig has so be- 

 come partly carnivorous. The Bear has changed from being carniv- 

 orous to become in part a vegetarian. 



In Ohinitahi the mountain Parrot has partly changed from a 

 honey eater to a flesh eater. They will attack a sheep and pick a hole 

 in him, and suck his blood. If he lies on the injured part, they will 

 tear open another hole, and often he dies. 



There are Rabbits on the Island of Sor that do not burrow. Hyenas, 

 in the uninhabited parts of South Africa do not burrow, but do in the 

 inhabited parts. ' ' Several mammals and birds usually inhabit burrows 

 made by other species, but when such do not exist, they excavate their 

 own habitations. " Beavers of Europe and Oregon go single, and do 

 not associate in colonies, or build dams, or huts. "Wild canines do not 

 bark, but growl. European dogs, when conveyed to Guinea, in a few 

 generations cease to bark, and go back to the growl of the native dogs. 

 Certain cuckoos deposit their eggs in the nests of other birds, chiefly 

 magpies and crows. Some also colonize and build big basket-like nests 

 for the whole flock. 



Observe the educated instincts of the Shepherd dog, the retriever, and 

 the silent pointer, a sub-breed of the noisy hound. A young pointer 

 will imitate other pointers when he does not see the game himself. Some 

 point without teaching, but most require a lesson or example to imitate. 

 It is instinctive, because the young dog cannot be supposed to know 

 why he points. ' ' The habits and propensities of the springing spaniel 

 would never have been acquired but for the art of shooting birds on the 

 wing." 



Many birds with well-webbed f-eet seldom or never go near the 

 water, as the Upland Goose, of South America, certain Ducks, Sand- 

 wich Island Goose, &c. Other good water birds have only partial webs, 

 or only a slight fringe of web around each toe ; is the Water-hen, the 

 Grebe (thoroughly aquatic), and others of the Crex and Passa genera 



