PLATE XXXIX. 



Jurassic Dinosaurs. — Sauropoda. 



ATLANTOSAURID.E, MoROSAURID.JS, AND DIPLODOCID.E. 



Fig. 1. Chevron of Bronlosaunts excelsus Marsh; one-eighth natural size 172 



Fig. 2. Chevron of Apatosaurus ajax Marsh ; one-eighth natural size 167 



Fig. 3. Chevron of Morosaurus grandU Marsh; one-fourth natural size 182 



Fig. 4. Chevron of Morosaiirits grandis; one-half natural size. 182 



Fig. 5. Chevron of Diplodocus longua Marsh ; one-tenth natural size 180 



(i, front view; a', anterior end; b, side view; c, back view; d, top view; 



h, haemal orifice; p, posterior end; r, face for vertebra. 



322 



