FOSSIL FOOTPRINTS OF THE JURA-TRIAS. 



491 



Specific characters. Divarication of digits I and II, 141°; of II and III, 12°; of 

 III and IV, 6.5°. Length of digit I, .067 m. ; of II, .079 ni. ; of III, .120 m.; of IV, exclu- 

 sive of "heel" pad, .090 m. Length of foot exclusive of the hallux, .IGo m. ; including 

 the hallux, .210 m. Length of step, .260 ni. 



This form is evidently not a (rrallator from the shortness of step and the wide track- 

 way. The presence of the hallux removes it from Grallator and associates it with 

 Anchisauripus, though the presence of the three heel pads separates it from .1. (hmanus, 

 its nearest ally in point of size. It is also peculiar in the , ^^^ 



slight divarication of the toes, hence the specific name (fig. 9) . 



Type, no. '^^, of the Hitchcock cabinet, on red sandstone 

 from Gill, Massachusetts ; also reported from New Jersey. 



Anchisauripus tuberatus (E. Hitchcock). 



Bioiitozoinii tiiberatuni E. Hitchcock, '58, p. 66, pi. 1 1, fig. 

 2; pi. 52, fig. 7. 



///, r\ 



• \ Specific 



characters. 

 Divarica- 

 tion of digits 

 I and II, not 

 known ; o f 

 n and 111. 

 17°; of III 

 and IV, 8°. 

 Length o f 

 digit II,. 140 

 m.; of III, 

 .172 m.; of 

 IV, .107 m. 



Length of the foot, exclusive of hallux. 

 .249 m. Distance between lateral tips. 

 .152 m. 



This species resembles A. exsertus 



in size, being but little larger, but the 



two forms are readily distinguished by 



, , , , , , , the broad tuberous i^halanges of the one 



Fig. 10. Aiichisaunpustuoeratus {h. Hili^hcocK). Impress or the ■■ ^ 



right pes, X \. From the type, no. f J, in the Hitchcock cabinet. in ((UestioU. lu general character, the 



/. 



Fig. 9. Anchisauripus parallelux 

 (E. Hitchcock). Impression of the 

 left pes. X J. From the type, 

 no. V-, of tlie Hitchcock cabinet. 



