FOSSIL FOOTPRINTS OF THE JURA-TRIAS. 



501 



dicating a versatile pollex: of digits II and III, 22° to 29°; of III and IV, 24° to 50°; of 

 IV and V, 55° to 87°; of I and V, 120° to 152°. Length of digit I, .024 m.; of II, .029 

 m.; of III, .032 m.; of IV, .024 m.; of V, .(115 m. Length of step, .230 m. Width of 



trackway, -200 m. 



Although it is the type species, Anomoejms scambm is of comparatively rare occur- 

 rence so that in the present memoir the morphological studies were made upon A. inter- 

 medins, perhaps the most abundant form. The figure (fig. 18) was studied from no. 'i, of 

 the Hitchcock cabinet, together with no. ^ and the drawing in Deane ('61, pi. 32) . The 

 last is from a magnificent specimen formerly owned by T. Leonard, Esq., of Greenfield, 

 Massachusetts, and at present lost sight of. An interesting feature occurs on no. f|, viz., 

 the somewliat lenticular impression of the breast of the animal possibly made by a 



plastron-like armature. 



Types, nos. 'f and |^, of the Hitchcock cabinet, on red shale, the latter from Turner's 



Falls, Massachusetts. 



Anomoepus intermedius E. Hitchcock. 



Anomoejms biterviediiis E. Hitchcock, '65, pp. 2 and 7, pi. 1, fig. 1; pi. 15, fig. 1. 

 This species is based upon part of Brontozoum isodnctylnm E. Hitchcock, '58, p. 69. 

 Here also probably belong the following species : — 



Saurojnis harrattii E. Hitchcock, '45b, p. 24. 



Aethiopus minor E. Hitchcock, '58, p- ''j'-' (in part) . 



Flesiornis quadriipes E. Hitchcock, '58, p. 102, pi. 17, fig. 7 ; pi. 35, fig. 1-2; pi. 55, 



fig. 5. 



PlectrojJterna minitans E. Hitchcock, '58, p. 108. 



AjycUichnus holyokensis C. H. Hitchcock, '89b, pp- 

 118, 123, 124. 



Specific characters. Pes : divarication of digits 1 and 

 II, 56°; of II and HI, 20°; of HI and IV, 35°; of I and 

 IV, 110° or more. Length of digit II, .052 m.; of HI, 

 .073 m.; of IV, .057 m. Length of foot, .105 m.; includ- 

 ing the heel, .173 m. 



Manus: divarication of digits 1 and II, 33°; of II and 

 HI, 22° ; of HI and IV, 68° ; of IV and V, but little, as they 

 are nearly parallel. Length of digit I, .015 m.; of II, .028 



m.; of HI, .030 m.; of IV, .023 m. Length of step varies Hitchcock, impression of the right pes of 



a walking animal, with the bones restored. 



in the same animal from .140 to .235 m., the average 



being about .220 m. Width of trackway, .150 to .180 m. the Hitchcock oaW 



Fig. 19. Anomoejms intermedius E. 



X \. From the type .specimen, no. -\8-, of 

 linet. 



