AM. JOUR. SCI., Vol. XXI, 1881. Plate XIV. 
4.—The sam 
The signification of the wears is the same -in all the rae viz: all ; 
¢, cup; d, icp ed f, lateral foramen; 2, neural canal; jarayophyss 
t, peas l rib; 2, anterior zygapophysis; Pa ; — Zy hh 
All the Maat Be are one-twelfth natural size 
nite aie 
