528 RICHARD SWANN LULL ON 



The kaown specimens are those of seated animals about the size and proportions of 

 Anomoepus minimum E. Hitchcock, and possibly referable to that species. 



The type specimen is no. f|, of the Hitchcock cabinet, from Turner's Falls, Massachu- 

 setts. It seems further possible that Plectropternu (/lyiriJls E. Hitchcock, may also 

 belong here, as well as P. /'uieans E. Hitchcock. 



Harpedactylus gracilior E. Hitchcock. 



Ildrpedactylus ijracUior E. Hitchcock, '65, p- 1-i, pi. o, fig. 2. 



This form is very similar to the preceding species except that it is much smaller and 

 the manus is unknown. It is inipossible to refer it to any known Anomoepus because of 

 its size, but its affinities are probably with that genus. H. f/racifio)' is known from but 

 two specimens, nos. H and ^, of the Hitchcock cabinet, both from Turner's Falls, Massa- 

 chusetts. 



Harpedactylus crassus E. Hitchcock. 



Harpedactylus crassus E. Hitchcock, '65, p. 12, pi. 3, fig. 1. 



This species is based upon a single badly worn specimen showing both manus and pes 

 tracks. It is a characterless track of doubtful affinity. It could, however, have been 

 formed by Anomoepus scanibus as the size and proportions of fore and hind feet agree ; 

 but tlie subsequent slipping of the mud has distorted the impression very much. 



The type specimen is no. f|, of the Hitchcock cabinet, on gray sliale ; type locality 

 unrecorded. 



Subclass Synapsida Osborn. 



Order TESTUDINATA. 



Quadrupedal forms, generally with short stride and wide trackway indicating short 

 legged, broad bodied creatures. Often with longitudinal traces which may have been 

 made by dragging tail, limbs, or plastron. The reference of the following genera to this 

 order is by no means certain, being based upon President Hitchcock's opinion. 



Genus Ancyropus E. Hitchcock. (Anchor foot.) 

 Ancyropus E. Hitchcock, '45b, p. 24; '58, p. 138. 



Generic characters. Quadrupedal, plantigrade. Pes tetra- or jDcntadactylous, hallux 

 semirotated, the other digits turned outward very strongly. Manus tetradactylous, dig- 



