HIEUNDO EUSTICA. 83 



especially the class of the Tangles (Algae) swim about freely in the water in 

 early life, like the lower animals just mentioned/' 



Again (p. 359) : — "Storms may carry birds and insects across half the 

 earth's circumference. They drop in the United States, having risen in 

 England ; starting from California, they only come to rest in China." 



Compare also Darwin, ' Origin of Species/ p. 349, who says : — "Almost 

 every year one or two land-birds are blown across the whole Atlantic Ocean 

 from North America to the western shores of Ireland and England"*. 



We see, therefore, that migration is a great mundane law which 

 requires no intelligence, no instinct, and is performed by most organisms, 

 high and low. 



If we reflect upon this, the wonder with which we regard avine 

 migration is greatly diminished ; for that which is performed constantly and 

 with safety, without the aid of sight, instinct, &c., may surely be accomplished 

 with those qualities. 



"^ One would suppose that if birds are wafted thus to England at rare intervals_, other things 

 (as insectS;, for instance) might be so. A very strange circumstance took place on February 20th^ 

 1875. On this day a living locust was discovered in a well near the Race-hill^ Brighton. Mr. F. 

 Bond examined the specimen in my house^ and at once perceived that it was not the common species 

 which we find on the south coast in autumn. The identification of it proved a source of difficulty 

 for some time ; but he has now ascertained that it is Tropidoderes cristata, Linn._, a native of Brazil. 

 How it reached this country is_, of course^ a matter each may resolve according to his own fancy. I 

 must here record my thanks for his exertions in the search. The locust is in my possession. 



Though I am unable to say how this insect came to Brighton, the migration of butterflies is 

 well known. The Bev. F. O. Morris says ("^ History o£ British Butterflies/ p. 19) : — ^^ Small white 

 Pontia rapcB. — An extraordinary migration of this butterfly from France to Dover was witnessed on 

 the 5th of July, 1846. The ^ Canterbury JournaP recorded that such was the density and extent 

 formed by the living mass that it completely obscured the sun from people on board the steamers 

 for many hundred yards, while the insects strewed the deep in all directions. The flight reached 

 England about 12 o^ clock at noon.-'-' This is the point 1 wish to note : — ^^ During the sea-passage 

 the weather was calm and sunny, with scarcely a puff of wind ; but an hour or so after the butterflies 

 reached ^ terra firma^ it began to ^blow great guns^ from the S.W., the direction whence the insects 



