124 NATURALIST'S CABINET. 



Two bastard species Forster's remarks. 



so numerous as to deprive each other of the ne- 

 cessary food. A few fish only produced a hun- 

 dred thousand young carp. The last mentioned 

 carp weighed nineteen pounds ; and its eggs one 

 pound fourteen ounces. A drachm of these eggs 

 contained one thousand two hundred and ninety- 

 five, so that the whole roe c'ould not consist of 

 less than six hundred and twenty-five thousand 

 and six hundred. The carp in M. Sch level's 

 ponds grow to a great size, which Bloch attri- 

 butes to the abundance of the plant called Naya, 

 which grows in them. 



A mixed breed is produced by the carp with 

 the gible and crusian, two varieties of the carp 

 genus, which never attain the size of the carp, 

 but are considerably larger than the two latter 

 fish. These bastard species seldom weigh more 

 three pounds, and always have the head and tail 

 of the male parent. It is supposed they are in- 

 capable of continuing the breed. 



Mr. J. Rheinhold Forster, in the Philosophical 

 Transactions for 1771, says, in Polish Prussia, and 

 many other parts of Germany, where the sale of 

 the carp constitutes a part of the revenue of the 

 nobility and gentry, the proper management of 

 that fish is reduced to a kind of system, founded 

 on the experience of several generations. The au- 

 thor here communicates all the particulars which 

 he has been able to collect from the practice of 

 these experienced breeders and feeders of carp, 

 and from his own observation. He recollects to 



