APPENDIX. 



I. Sources for Materials. The great majority of the 

 animals studied should be those native to the locality of 

 the class. Sometimes, however, it is necessary to supple- 

 ment the native supply at seasons when it is not readily to 

 be had, or to secure types not well represented there. The 

 following are a few of the reliable dealers in biological 

 material. Most of them publish price lists. 



Supply Department, Marine Biological Laboratory, 

 Wood's Hole, Mass. (Preserved materials.) 



Henry M. Stephens, Carlisle, Pa. (Preserved and living 

 animals.) 



Dr. F. D. Lambert, Tufts College, Mass. 



Aquarium Supply Co., Delair, N. J. (Living animals). 



A. A. Sphung, North Judson, Indiana. (Living frogs, 

 turtles, clams, crayfish.) 



The writer's laboratory (Millikin University, Decatur, 

 111.) will be able to furnish a limited number of microscopic 

 slides to illustrate cell structure, cell division, tissues, 

 cleavage, gastrulation, sections showing the typical 

 arrangement of organs in sponges, ccelenterates, worms, 

 amphioxus, etc. These are often valuable for demon- 

 stration or to stimulate extra study. 



The University of Kansas (Lawrence) will supply speci- 

 mens at cost to the secondary schools of the State. Other 

 State universities are glad to help teachers wherever 

 possible. 



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