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IOWA ACADEMY OF SCIENCE Voi.. XXVIII, 1921 
reference reading. The subject matter to be covered by lectures 
must, of necessity, be condensed, systematically arranged, and 
while it should not include a species description of the parasite, it 
should include generic characters. The species description takes 
a great deal of time, and can be much better handled by being given 
in the form of a printed outline for use in the laboratory. For 
example — in taking up the Ascaridae, the lecture work would 
cover briefly the group, class, order, family and genus with a list 
of the different species. From this point the lecture work would 
include the question of ascariasis in all species of domestic animals 
as outlined later. The laboratory work should consist of an ex- 
amination of the more important animal parasites with special 
emphasis on the morphology for purposes of identification, for an 
understanding of the injurious action of the parasite and those 
morphological structures which have to do with reproduction, life 
history and indirectly with methods for control. The laboratory 
work should further consist of demonstrations of gross specimens 
of the parasite and tissues showing lesion. In many cases histo- 
logical preparations are indicated and all can be supplemented to 
good advantage by the use of charts, drawings, and lantern slides 
in the lecture room or laboratory. The reference reading assign- 
ment must be definite, and not require that a student read exten- 
sively to obtain a minimum amount of information. 
THE SCOPE OF WORK 
The subject of parasitology as taught to veterinary students 
should include only those forms of animal life that are visible to 
the naked eye except for the few cases cited below, or in other 
words it should not attempt to cover microorganisms even though 
many such are in the animal kingdom. Realizing from experience 
that there will of necessity be some overlapping, it is to be counted 
as a gain to the student rather than a loss or unnecessary duplica- 
tion ; for example, piroplasma, trypanosoma, coccidia, sarcosporidia 
and all microscopic forms, even though they seem to have a pro- 
tozoan relationship, should be dealt with in bacteriology or micro- 
biology and only indirectly referred to in parasitology. A discus- 
sion on animal parasites to be complete must, of course, include 
the lower forms of animal life, but our point is, while we would in 
a general way and in our classification include the above micro- 
scopic forms, we would leave specific information and detailed 
study of these forms to the study of microbiology. On the other 
hand, acarina (Ex. Demodex and Laminisioptes cysticole), which 
