PLATE 5 : 
EXPLANATION OF FIGURES 
22 Rectus abdominis muscles of Western pocket gopher (Thomomys bottae 
pascalis), open type of pelvis. 
23 Rectus abdominis muscles of meadow mouse (Microtus pennsylvanicus). 
24 Rectus abdominis muscles of house mouse (Mus musculus). 
25 Rectus abdominis muscles of star-nosed mole (Condylura cristata). 
26 Rectus abdominis muscles of shrew (Sorex sp.). 
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