SO re 
> 
M. JOURN. SCI., Vol. XXI, 1881. Plate VI. 
Figure 1—Brain-cast of Stegosaurus ungulatus, Marsh, side view ; ol, olfac- 
to Foss Sek ¢, fosmid oe op, optic ¢ lobes; on, opt ic nerve ; 
eb, cerebellum , me 
Figure 2. mney rain- aa oie from above. 
Figure 3.—Cast of borate cavity in bea of Stegosaurus ungulatus side 
Piel fe anteri ; f, foramen betwee sein oss st wr Prone ee Bac 
sce aed and third vertebre ; 7", tween third 
ap a Ta st vertebre ; iP soni - neural canal i os last Bees carta: 
Figure 4. cag to ast, seen fro Ov 
Figure 5.—0 Outlines representing transverse sections through same brain, and 
sacral cavi ,»b ra 
All the efgures are one ‘at aicae ‘la 
