113 



most simple to the most highly organized, and between which 

 no intermediate state can be supposed to exist. It is there- 

 fore necessary that we should form an accurate knowledge of 

 each individual, before any system can be adopted ; and it is 

 only by investigating thoroughly each chatacter in all its rela- 

 tions to certain sets of individuals, that we are enabled to 

 distinguish each individual of any particular group, in lan- 

 guage sufficiently explicit to separate it from those imme- 

 diately preceding it. 



Thirteenth Meeting — April 29, 1850. 



J. B. YATES, Esq., in the Chair. 



Mr. R. Ormebod Smith and William Ihne, Ph.D., were 

 elected members of the Society. 



Mr. J. P. G. Smith exhibited some butterflies from Para, 

 hitherto unknown in England — the Callitkaa aapphira and 

 C, lepri&uri. 



Dr. Inman then read a paper upon TAe Distinction between 

 Animal and Vegetable Life. 



He passed in review most of the tests which have been 

 hitherto applied to determine this knotty question. He dwelt 

 particularly upon the motions of vegetables and the power 

 that the spores of many of the minute Confervse had of loco- 

 motion, and showed that the velocity of their swimming ex- 

 ceeded that of the Rotiferse, a comparatively highly organized 

 class of animals. These spores became fixed in the subsequent 

 part of their career. 



Q 



