AM. JOUR. SCI., Vol. XVII, 1879. Plate V. 
Pe ee 
Figure 1 1.—Pelvie arch of reciente grandis Marsh; seen from in front. 
-sixte 
Figure ah baa of pe grandis; seen from below. One-tenth 
al 81Z 
a. first sacral vertebra; 6. transverse process of first sacral vertebra; 
of 
. oe process of second vertebra; d. transverse process third 
ve é. tra —— Base: of last sacral vertebra; /. foramen between 
n ge 
h 
bra: ne. neural canal; i. ilium; 7s. ischium; pb. 
