Measurements of Hylerpeton longidentatum Dawson.
| Length of mandible | 4 | cm. |
| Length of vertebra | 5 | mm. |
| Length of rib | 3 | cm. |
| Length of humerus | 1.5 | cm. |
| Length of femur (?) | 1.2 | cm. |
| Length of tibia | 8 | mm. |
| Length of mandibular teeth | 3 | mm. |
| 6 to 7 teeth in 1 cm. | ||
Hylerpeton intermedium Dawson.
Dawson, Proc. and Trans. Roy. Soc. Canada, XII, p. 75, 1895.
Type: Specimen No. 3061-5, Peter Redpath Museum, McGill University. Horizon and locality: Coal formation at the South Joggins, Nova Scotia. This species is known only by the mandibles and portions of the skull, which are rather shorter than those of adult individuals of the last species. The extremity of the mandible and the cranial bones have the same slightly waved surface as in the other species. Mandibles 3 cm. long and the teeth, which are about 15 in each ramus of the lower jaw, are simple, with large pulp cavities, those of the maxillary bone slightly enlarging upwards, and intermediate in form between the long, slender teeth of H. longidentatum and the thick, obtuse teeth of H. dawsoni.
Coal formations, South Joggins, Nova Scotia, in erect tree, discovered by P. W. McNaughton, 1893.
Dawson, Phil. Trans. Roy. Soc. London, 1882, pt. II, p. 634.
Lydekker, Cat. Fossil Reptilia and Amphibia, pt. IV, p. 225, 1889.
Type: Fritschia curtidentata Dawson.