1911] Bryant: Horned Lizards of California and Nevada 11 
the postischial symphysial cartilage. In the different species it 
was found to vary in length and in the character of the tip. In 
some species (Phrynosoma platyrhinos, Anota maccalli) the tip 
is bifid. A tendeney toward ossification was also found, the 
cartilage in Phrynosoma blainvillet blainvillei being ossified and 
that in Anota maccalli being partly ossified. The great differ- 
ence in length and in the character of the tip, which may be 
found in the different species, is well illustrated in figures A 
and B. 
Fig. A. Pelvie girdle of Phrynosoma blainvillei blainvillei (Univ. Calit- 
Mus. Vert. Zool., no. 272). pub., pubis; il., ilium; isch., ischium; postisch. 
sym. cart., postischial symphysial cartilage. X 2. 
Fig. B. Pelvie girdle of Anota maccalli (Univ. Calif. Mus. Vert. 
Zool., no. 1006). pub., pubis; il., ilium; isch., ischium; postisch. sym. cart., 
postischial symphysial cartilage. X 2. ; 
