[CHAPTER XIV.]

THE MICROSAURIAN FAMILY TUDITANIDÆ, FROM THE COAL MEASURES OF OHIO AND PENNSYLVANIA.

Family TUDITANIDÆ Cope, 1875.

Cope, Geol. Surv. Ohio, II, pt. II, p. 357, 1875.

Lizard-like microsaurians; cranial elements strongly sculptured with pits or grooves or almost smooth, with weak punctulations. Orbits usually well forward; squamosal sometimes excluded from the parietal; skull hornless; teeth pleurodont, conical and sharp, smooth or slightly plicate; clavicle of a triangular shape, which is characteristic of all the species; vertebræ well developed and phyllospondylous, the osseous portion being merely a hollow cylinder, hour-glass-shaped; ribs curved, long, attenuated and intercentral; digits clawed; ventral armature absent in all but a single species and the association of the species is doubtful; tail moderate in length. Three genera with 13 species included in the family. These species are:

Tuditanus punctulatus Cope, Linton, Ohio.
brevirostris Cope, Linton, Ohio.
longipes Cope, Linton, Ohio.
minimus Moodie, Cannelton, Pennsylvania.
walcotti Moodie, Linton, Ohio.
Erpetosaurus radiatus Cope, Linton, Ohio.
obtusus Cope, Linton, Ohio.
tabulatus Cope, Linton, Ohio.
minutus Moodie, Cannelton, Pennsylvania.
sculptilis Moodie, Cannelton, Pennsylvania.
acutirostris Moodie, Linton, Ohio.
tuberculatus Moodie, Linton, Ohio.
Odonterpeton triangularis Moodie, Linton, Ohio.

The association of these species in the one family is provisional and will need revision on the acquisition of new and more complete material.

Genus TUDITANUS Cope, 1874.

Cope, Trans. Amer. Phil. Soc., XV, p. 271, 1874.

Cope, Geol. Surv. Ohio, II, pt. II, pp. 391, 1875.