FOSSIL FOOTPRINTS OP THE JURA-TRIAS. 



495 



///, 



in.; of III, .()")5 in. ; of IV, .(M-J ni. Length of foot. .(IT'.J ni. Distance between lateral 

 tips, .Ool ni. Projection of the middle toe heyond the others, .Oo:! m. Length of step. 

 .610 m., giving a ratio of foot to step of about one to eight. 

 Width of trackway, .dOO m. 



The figured specimen, no. -~, of the Hitchcock cabinet, 

 is the type. The specimen is in high relief upon coarse 

 sandstone from South Hadley, Massachusetts. It occurs 

 in association with Oiozoum moodii and Anchisauripus 

 dananus. It is also reported from New Jersey (figs. 12 

 and 13) . 



Grallator tenuis E. Hitchcock. 



Fig. 13. Grallator cursorius H Hitch- 

 cock. Impression of the left pes. X y. 

 From no. ?, of the Hitchcock cabinet. 



.A III. 



Grcdlator tenuis E. Hitchcock, '58, p- 73, pi. 13, fig. 4 ; 

 pi. 53, fig. 5. 



Specific characters. Divarication of digits jll andllll, 

 15° to 25° ; of HI and IV, 25° to 28° ; of II and IV, 40° to 

 45°. Length of digit II, .030 m.; of III, .049 m. ; of IV, 

 .045 m. Length of foot, .073 m. Distance between lateral 

 tips, .037 m. Length of step. .195 m. Width of trackway, 



.063 m. 



The chief distinctions between this form and G. curso- 

 rius are the shorter stride and greater divarication of the 

 toes of the present species. Botli of these are variable 

 quantities and future research may prove the species to be 

 synonymous in which ease G. ciirsorii(s would have priority. 

 The type specimens are nos. '^ and ^, of the Hitch- 

 cock cabinet, counterparts, from Turner's Falls, Massachu- 

 setts. The slabs are red shale and were found in close 

 proximity to the trap. The figured specimen is no. '^, of 

 the Hitchcock cabinet (fig. 14). The species is also 

 reported from Connecticut and New Jersey. 



Grallator cuneatus K. Hitchcock. 



Gr(dIafor cnuratiix E. Hitchcock, '58, p. 74, pi. 13, fig. 

 6; pi. 39, figs. 1, 3; pi. 41. fig. 1-2. 

 Fig. 14. Grallator tenniH K. Hitch- Sneciiic rhciracters. Divarication of digits 11 and HI. 



cock. Track of the l.-ft pe.s. x }■ ^ • . ^ , ,,^ ,,.« t .1 i- 



From no. V. of the Hitchcock cabinet. 23°; of HI and IV, 23°; of II and IV, 46°. Length ot 



