218 MAMMALIA (tHE RABBIT) 



(6) The Pelvic Girdle. 



(a) Identify the three bones, ilium, ischium, and os 



pubis, in each side of the pelvic girdle. 



(b) Why are these bones so firmly ankylosed together? 



(c) Function of the pelvis? 



(7) The Hind Limbs. 



(a) Which segment is longest? 



(b) How long is the tibia, compared with the fibula? 



(c) How are they united? 



(d) With what is the fibula united below? 



(e) What part of the hind foot does the rabbit rest upon 



the ground when in locomotion? 

 10. The Nervous System. If it is desired to work out the 

 nervous system, take a fresh specimen. Skin it, remove the 

 internal organs, and follow the directions under the Nervous 

 System in the study of the frog. 



SYSTEMATIC STUDY OF THE RABBIT 



For study of Branch and Class characteristics, see studies 

 of Chordate Branch and Class Characteristics, p. 128. 



Study of Ordinal Characteristics 



Have for reference several different species of the order to 

 which this animal Ijelongs. If not present for reference, name 

 and have in mind several different species of the order. 



1. The Exoskeleton or Covering. 



(1) Do you discover any ordinal modifications of the class 



covering? If so, what? 



(2) Of what use is it to this order of animals? 



2. The Head. What ordinal peculiarities do you discover as 

 to the size, shape, or appendages (horns, tusks, etc.) of the head? 



3. The Teeth. 



(1) Present or absent? 



(2) Kind of teeth present (incisors, canines, molars)? 



(3) What does the kind of teeth indicate as to the food 



and feeding habits of this order? 



(4) If it has no teeth, what substitute does it possess? 



