88 THE COAL MEASURES AMPHIBIA OF NORTH AMERICA. 



or 23 pairs preserved. They are single-headed and the extremities are attenuated. 

 No traces of ventral scutellse are present. 



The entire length of the animal probably did not exceed 5 or 6 inches. Its 

 form was quite lizard-like and it was probably of an ambulatory type, though it 

 may have spent a part of its time in the old lagoon in which its remains were finally 

 buried. No traces of external gills have been detected in this or any other Linton 

 species. 



MEASUREMENTS OF THE TYPE OF TUDITANUS PUNCTULATUS COPE. 



mm. mm. 



Length of entire specimen . 94 Width of humerus at proximal end. . 2.5 



Median length of skull ... 22 Length of ulna 6 



Width of skull at occiput 19 Width of ulna at proximal end . . 



Depth of mandibular ramus. . . 4 Length of phalanx (metacarpal?) . 2 



Length of the 23 vertebrae .. . 61 Expanse of longest ribs. . 1 6 



Length of interclavicle 6.5 Length of rib. .. . 10.5 



Width of interclavicle 4-5 Width of rib . . 



Width of the three pectoral plates . 10 Length of a vertebra .. 2.5 



Length of humerus 8 



Tuditanus brevirostris Cope. 



COPE, Trans. Amer. Phil. Soc., xv, p. 272, 1874. 



COPE, Geol. Surv. Ohio, II, pt. n, p. 393, pi. xxvi, figs. 3, 4, 1875. 



MOODIE, Bull. Amer. Museum Natl. Hist., xxvi, art. xxv, pi. Ixiv, fig. 4, 1909. 



Type: Specimen No. 8609 G, American Museum of Natural History. 



Horizon and locality: Linton, Ohio, Coal Measures. 



This species was associated by Cope with the type T. punctulatus in the descrip- 

 tion of the genus. Represented by a portion of the skeleton of one individual, the 

 skull is preserved on one block, with a considerable part of the anterior ribs, pec- 

 toral girdle, and vertebral column, although this last is not clearly represented, but 

 as in so many of the coal specimens the bones are covered with a thin layer of car- 

 bonaceous matter which makes it impossible to definitely determine the form. 



The cranium is large in proportion to the size of the body. The skull is in the 

 form of a wide oval and is wider than it is long. The elements of the skull were orna- 

 mented with a coarse sculpturing which partakes of the nature of incomplete radia- 

 tions on the squamosal region. The different elements of the cranium can not be 

 distinguished, although I think the outlines of the parietal are indicated. The 

 position of the nostrils is well forward and they are slightly elongate transversely. 

 The pineal foramen can not be determined. The orbits are oval in shape and their 

 width is about equal to two-thirds of their length. The interorbital space is greater 

 than the length of the orbit. Cope's figure of this specimen is not accurate, since 

 he has the orbits drawn too far to the side. They are located near the central line 

 of the skull and resemble in some respect those of the preceding species. Cope has 

 described teeth in the maxillary region, but I am unable to detect them. There are 

 portions of two pectoral elements which may represent a clavicle and a portion of 

 the interclavicle. 



The clavicle has much the same shape and practically the same ornamentations 

 as has the clavicle in Tuditanus minimus. The clavicle preserved shows a somewhat 

 triangular shape and is slightly acuminate at the anterior end, as preserved, and 

 obtuse at the posterior end. The nature of the interclavicle can not be determined. 



