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standard of classification is "species," and then explained, 

 with the aid of the blackboard, how new species are sup- 

 posed to be produced. Aids to classification next occupied 

 his attention, and some of the chief facts of palaeontology 

 and embryology were referred to, in order to show that 

 no system can be complete without the study of those 

 branches of natural history. He then showed typical 

 examples of the great subdivision of the animal kingdom, 

 some of the specimens being from the museum ; and by 

 means of numerous diagrams he pointed out the various 

 features of the animal kingdom which play a part in clas- 

 sification, exhibiting the "archetypes" of the vertebrates 

 and invertebrates. Mr. Samuelson finally drew a com- 

 parison between the changes that have taken place in the 

 natural world, in history, and in society, and showed that 

 the whole plan and execution of the phenomena of the 

 universe are clearly under the guidance of one Perfect 

 Intelligence. 



At the close of the lecture, Rev. E. C. BOLLES spoke 

 of the pleasure he had derived from the interesting and 

 instructive lectures, and submitted the following : 



Resolved, That the hearty thanks of the Essex Institute 

 are tendered to James Samuelson of Liverpool, England, 

 for the two very instructive lectures delivered by him 

 before this Society on this and the preceding Monday 

 evenings. 



Mr. D. B. HAGAR in seconding the resolution, spoke of 

 the lecture given before the scholars of the State Normal 

 School, who derived much information on an important 

 topic. The resolution was then unanimously adopted. 



Mr. SAMUELSON gracefully responded, hoping that he 

 should at some future time have the pleasure of revisiting 

 this city. 



