The species is proposed in honor of Dr. Bashford Dean, to whom I am greatly indebted for many kindnesses during the past 5 years in connection with my studies on Carboniferous Amphibia, particularly in the loan of the entire Newberry collection of Linton, Ohio, Amphibia.
| Measurements of the Type of Macrerpeton deani Moodie. | |
| mm. | |
| Length of portion preserved | 115 |
| Greatest width | 50 |
| Length of tooth | 9 |
| Width at base | 4 |
| Length of angular | 95 |
| Diameter of angular | 25 |
| Measurements of specimen No. 8535 G, American Museum of Natural History, associated with the above in the type description: | |
| Length of preserved portion | 140 |
| Diameter of orbit | 22 |
Family ANTHRACOSAURIDÆ Cope, 1875.
Cope, Bull. U. S. Nat. Mus., I, p. 10, 1875.
Lydekker, R., 1890, Cat. Fossil Reptilia and Amphibia, p. 157.
Skull usually triangular and more or less angulated, with the cranial sculpture well marked, the occipital condyles ossified, and the palatine foramina very small and placed far back; dentine of the teeth more or less complexly plicated. A ventral armor of elongated dermal scutes, and probably a sclerotic ring. Bodies of vertebræ fully ossified in the adult; intercentra present or absent. According to Atthey's figure ([11]) of the skull of the type genus, the palatine bears teeth which are situated immediately on the inner side of the maxilla, as in Mastodonsaurus ([242]). In the typical forms there is no postarticular process to the mandible.
The North American species of this family are: Eosaurus acadianus Marsh, Eobaphetes kansensis Moodie, Dendrerpeton acadianum Owen, Dendrerpeton oweni Dawson, Platystegos loricatum Dawson, Baphetes planiceps Owen, Baphetes minor Dawson.
There is but little assurance that any of these species belong in this family. They are put there provisionally, pending future discoveries. Huxley suggests the relationship of Eosaurus and Anthracosaurus (Quart. Jour. Geol. Soc., XIX, 1863, p. 65; Scientific Memoirs, II, p. 566).