COERECTIONS. 



PHYSAD.E, p. 8, 1. 9, dele more highly. 

 22, 1. 5.J., read negroes. 

 26, 1. 14., for 2 read a, and for 3 

 read 2. 



LIMNEA, p. 4. The tentacles are very sensi- 

 tive, as indicated by the fact that if a drop of 

 ink or other colored acrid fluid be placed near 

 them, they will be suddenly withdrawn, and 

 the course of the animal altered. The use of 

 a colored liquid enables one to know the mo- 

 ment of its contact with the tentacle. 



LIMNEA, p. 33, 41, 49, for signature K read 

 J (5, 6, 7). 



PALUDINA, p. 22, 1. 4, 6.J., read urceus. 



