ICHNITES. 221 



20045 a. Slab showing tracks of this and other forms ; from the 

 reputed Trias of Greenfield, Massachusetts. 



Purchased, 1846. 



ANISOPUS, Hitchcock \ 

 Manus and pes with four digits each ; the pes being nearly twice 

 as large as the manus. 



Anisopus gracilis, Hitchcock 2 . 

 The type species. Length of the foot 0-9 inch. 

 Hab. North America. 



36594. Slab of sandstone with footprints ; from the reputed Trias 

 of the Connecticut river, Massachusetts. 



Presented by Prof. Hitchcock, 1862. 



Tracks of this form are also shown on the slabs 18322 and 20045 

 (infra). 



ANOMCEPUS, Hitchcock 3 . 

 Manus apparently with five digits, pes with three, all of which 

 are directed forwards. Heel long. 



Anomoepus intermedins, Hitchcock 4 . 

 Hob. North America. 



28106. Slab with a footprint ; from the reputed Trias of Turner's 

 Falls, Connecticut river, Massachusetts. 



Presented by Prof. C. H. Sheppard, 1852. 



Anomoepus curvatus, Hitchcock 5 . 



Anomoepus gracillimus, Hitchcock 6 , 

 Syn. Brontozoum gracillimum, Hitchcock 7 . 

 Hab. North America. 



18322. Two large slabs of shale with impressions of the feet of 

 these and the preceding forms, together with those of 

 Anisopus gracilis, Grallator cuneatus, and Tridentipes 

 elegantior ; from Turner's Falls. Purchased, 1844. 



1 Mem. Amer. Acad. ser. 2, vol. iii. p. 226 (1848).— Preoccupied. § 



2 Loc. cit. 3 Loc. cit. 



4 Supplement to Ichnology of New England, p. 2 (1865). 



6 Loc. cit. 6 Loc. cit. 



7 Mem. Amer. Acad. ser. 2, vol. iii. p. 175 (1848). 



