FOSSIL FOOTPRINTS OF THE JURA-TRIAS. 



509 



Manus : turned inward toward the median line. Caudal trace sinuous, not always 



present. 



Type specimen, no. V, of the Hitchcock cabinet, from Turner's Falls, Massachusetts. 

 Figured specimen, no. ^, on red micaceous sandstone from the Ferry at Turner's Falls, 

 Massachusetts (fig. 29) . 



Apatichnus minus (E. Hitchcock). 



Gigantitherium nuims E. Hitchcock, '58, p- 9.3, pi. 17, fig. 1 ; pi. 41, fig. 2 ; pi. 42, 



fig- 2. 



Specific characters. Pes: divarication of digits H and HI, 20°; of HI and IV, 43.£)°. 

 Length of digit II, .KIS m.; of III, 

 .147 m.; of IV, .146 m. Length of 

 foot, .225 m. Distance between lat- 

 eral tips, .160 m. Length of step, 

 .630 m. Width of trackway, .167 m. 

 Caudal trace straight, interrupted at 

 each step. Manus : unknown. 



This form was associated by 

 Hitchcock with G-igandijms caudatiis, 

 though a far smaller species, but its 

 affinities seem to be rather with 

 Apatichnus, as it is evidently of the 

 same type as A. circumagens (com- 

 pare figures 29 and 30) . 



Type specimen, no. 3-, of the 

 Hitchcock cabinet, on micaceous shale 

 from Lily pond, Tm-ner's Falls, Massa- 

 chusetts (fig. 30) . 



Genus Corvipes E. Hitchcock. (Crow foot.) 

 Corvipes E. Hitchcock, '58, p. 98. 



1 



2 



Fig. 30. Apatichnus minus E. Hitchcock. Imprint of the right 

 pes. X i. Fi-om the type specimen, no. i, of the Hitchcock 

 cabinet. 



Generic characters. Quadrupedal. 

 Pes tridactylous, ornithoid, digitigrade. 



Manus pentadactylous, digits curved, position of print a little in advance of, sometimes 

 without, again covered in part by that of the pes. No phalangeal nor claw impressions. 

 Tips of digits more or less acuminate. 



