THE. 
AMERICAN NATURALIST. 


Vor. XXXIX. November, 1905. No. 467. 

COLLECTION AND PREPARATION OF MATERIAL 
FOR CLASSES IN ELEMENTARY ZOÖLOGY. 
BERTRAM G. SMITH. 
During the past year the writer has frequently received 
inquiries concerning methods of collecting and preparing zoó- 
logical material for class use. The purpose of the present 
article is to give some of the methods used in the Department 
of Zoölogy of the University of Michigan in supplying a class 
of over a hundred students with laboratory material fora first 
course in elementary invertebrate zoölogy. A few organisms 
are included that are not ordinarily studied in a beginners' 
course, as some of them may be found useful for demonstra- ' 
tions, or for supplementary work. On the other hand, no 
attempt is made to make the list comprise all the forms adapted 
to a first year's course; for ecd of these, directions for col- 
lecting would be superfluous. 
1. Amaba1— Collect the water plant Ceratophyllum, which 
will be found growing in the quiet water of ponds and rivers, in 
the same habitats with water lilies, Elodea, etc. Gather the 
Ceratophyllum in considerable quantities, packing it in pails 
1H, S. Jennings. “Methods of Cultivating Amoeba and Other Protozoa for 
Class Use.” Journ. of Applied Micr., vol. 6, no. 7, p. 2406. 
779 
