184 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 5. 
EXPLANATIOX OK PlATKS. 
Plate I. Fig. A. Lateral as]>ccl of left fore linili and shoulder. X 3-3,- 
Fig. B. Lateral as])ecl of left hind limh. X .^J. 
Fig. C. Dorsal \ iew of sacral \erlelirae, showing attachment of pchic 
girdle. X 3- 
Fig. D. Atlas. X 4. 
Fig. E. Axis. X 4. 
Fig. F. Left innominate bone. X 3. 
Plate 2. Fig. A. Dorsal aspect of skull. X 3. 
Fig. B. Ventral aspect of skull. X 3. 
Fig. C. Lateral aspect of left mandible. X 3. 
Fig. D. Plantar surface of right hind foot. X 3- 
Fig. E. Pattern of the left U])per series of molariform teeth. X 10. 
Fig. F. Pattern of the left lower series of molariform teeth. X lO. 
Fig. G. Sternum. X 4. 
Plate 3. Lateral, ventral and dorsal view of Hctcroccphahts ijlahcr X 3/2. 
Plate 4. X-ray i>hotographs of Hcteroccphalus gtabcr. 
Dorsal & lateral aspect. Natural size. X-ray jihotograph l)y G. A. 
]\Ianghan. 
