52 
APPENDIX. 
EXPLANATION OF PLATES. 
Plate 5- — Hypsibema crassicauda. 
Fig. 1. Caudal vertebra of Hadrosaurus tripos, side ; la. articular 
face. 
Fig. 2. do. young? a. end ; b. below. 
Fig. 3. Escbrichtius polyporus, side. 3a. above. 
Plate 6 — Ilypsibema crassicauda. 
Eig. 1. Humerus, distal portion, from below; la. from end. 
Fig. 2. Tibia shaft, from the side ; 2a. from end. 
Fig. 3. Caudal vertebra. 
Fig. 4. Coprolite fragment. 
Plate 7 — Hadrosaurus tripos. Eschrichtius polyporus. 
Fig. 1. Fibula, lower portion ; a. proximal end of do. 
Fig. 2. Outer metatarsal, inner side ; 2a. proximal end of do. 
Plate 8 — Mesoteras lierrianus. Clepsysaurus pennsylvanicus. 
Thecachampsa rugosa. Polydectes biturgidus. Belodon priscus. Hio- 
don antiquus. 
Tig. 1. Mesoteras Tcerrianus, periotic bones, la. interior view; lb. 
end view. 
Fig. 2. Polydectes biturgidus , crown of tooth, side ; 2a. inner view. 
Fig. 3. Thecachampsa rugosa, crown of tooth, inner view. 
Fig. 4. Clepsysaurus, tooth, inside view ; 4a. posterior view ; 4b. sec- 
tion base ; 4c. do near extremity ; 4d. base of larger sp. 
Fig. 5. Belodon ? priscus, anterior tooth ; 5a. posterior view of an- 
other ; 5b. lateral view of a nosterior tooth ; 5c. edge of do. 
Fig. 6. Diodon antiquus, upper jaw, front ; 6a. do. from below ; 6b. 
lower jaw from front ; 6c. do. from above. 
