THE FOSSIL FOOTMARKS OF THE UNITED STATES, 226 



understand this case. But the statement may lead others, who 

 have better opportunity, to reach the truth. The imprints of the 

 fore feet on this slab, Plate 20, fig. 9, do not well correspond 

 with those of the Anomcepus scambiis, as given on the other draw- 

 ings ; and I am not without suspicion that it shows us tracks, not 

 only specifically, but even generically, different from the Anomce- 

 pus scambus. I might add, that the term scambus (crooked leg) 

 was derived from this slab, and may prove inappropriate to the 

 species. 



Plate 13, fig. 3, is copied from No. 170 of my cabinet. I can- 

 not resist the impression that it has a fourth toe, as represent- 

 ed, though the specimen is not one of the most distinct. It shows, 

 also, a rather remarkable ridge, common in this species, represented 

 by a dotted line ; the specimen appearing somewhat as if two heels 

 lay side by side. I am not prepared to explain it ; nor can I 

 admit that it results from an impression of the leg above the tarsal 

 joint. 



Species 2. Anomcepus Barrattii. (PI. XIV. Fig. 1.) 



Sauroidichnites Barrattii, Mass. Geol. Report, Plate 30, fig. 1 . 



Nos. 1, 139, in Cabinet. 



Hi7id foot. — Five-toed ; plantigrade : toes pachydactylous, 

 clawed, curved. Heel long. Divarication of the outer toes, 95° 

 to 130^ ; of the inner and second, 20° to 45° ; of the second and 

 third, 40° to 50° ; of the third and fourth, 30° to 40° ; of the 

 fourth and fifth, 10° to 20°. Length of the inner toe, 1.2 to 1.8 

 inch; of the second, 1.5 to 2 inches; of the third, 2 to 2.4 inches ; 

 of the fourth, 2 to 2.1 inches ; of the fifth, 1.4 to 1.7 inch ; of the 

 heel to the tarsal joint, 4.5 (?) inches ; of the foot, 7.5 inches. 

 Versed sine of curvature in the middle toe, 0.4 inch ; in the fourth, 



30 



