100 STUDIES OF ANIMAL LIFE. 



2. By means of what structures is each method accom- 



plished ? 



3. How many sets of paired appendages are there ? (If 



there are two sets, distinguish them as anterior and 

 posterior.) 



4. How many median appendages are there ? (Any 



structure supported by the continuation of the 

 vertebral column is not an appendage.) 



5. Do the paired appendages support the body ? 



6. What other uses have the appendages besides aiding 



in locomotion ? 



D. Response to Stimulus. (Dem.) 



1. Does the animal respond to the following forms of 



stimulus, — 

 (a) tactile (" touch ") ; 

 (6) auditory (sounds) ; 

 (0 light ; 

 (c?) chemical ? 



2. What senses do you infer are present ? 



3. Name the sense organs you see. 



4. Show the position of these organs by means of a 



sketch. 



E. Sense Organs. 



1. The Eyes. 



a. Can the eyes be closed ? 



b. How many eyelids are present ? 



c. Which eyelids are present ? 



d. Show by a sketch the size and shape of the pupil. 



2. The Nostrils. 



a. Is there any peculiar movement of the nostrils ? 



b. Is this connected with breathing or with smelling ? 



