15 
at which the specimens were discovered, is not known; but it is pro- 
bable, that they were obtained from the neighbourhood of Colonel 
Egerton’s residence, near Tarporley, and from one of the beds of 
sandstone, which alternate with the red and green marls in the upper 
part of the new red system in that part of Cheshire. 
The casts, which consist of a rather soft and coarse sandstone, 
were evidently formed in the impressions of two hind feet; and 
though they have suffered from exposure to the weather for twelve 
years, yet they are sufficiently perfect to have enabled Sir Philip 
Egerton to take the measurements of the different parts, and draw 
up the accompanying comparative table. It is necessary to state, 
that though he preserves the use of the term thumb for the conve- 
nience of comparison with previous descriptions, yet he is of opinion 
that the marginal digit which has been so designated, is not the re- 
presentative of the fifth, but of the first toe. 
Large Chi- 
Hessberg Storeton rotherium 
Direction of the Measurements. Chirothe- Chirothe- from near 
eee Hiecee tne acelicalthe peintee che ai: OS Tae 
ength from the heel to the point of the 
MARLO GRORRS seeds este Sisk woabe:s: s/aucvere a versus on aS tea 
Length from the heel to the point of the 
Beet reuse ees ees occ tere seciclan c apaie scores ep o8 43 eu 
Length from the heel to the angle between 
the list ginal Pinas: Goesbeecoododede } Satiela cu heuae 10 0 
———— 2nd and 8rd toes 4 4 5 8 10 
se dsrd and 4th toes 4 0 i Bl oo. il '@ 
Greatest breadth across the insertions of 
GINS TOES > coded: Hp age Dep Ee tee Pay ee 8 5 
Breadth from the point of the thumb to e 
AGE LOC MMMEMIN (545 cic rejeshele sinilot le es sie 6 ste oss fY ae Dan0 
Breadth from the thumb to point of 4thtoe 6. 3 OS 0R-s- NOG 
Breadth across the sole below the thumb... 3 6 Bi Deo BG <0) 
Breadth from Ist toe-point to 4thtoe-point 4 6 4 6 9 0 
From these measurements it appears, that considerable differences 
exist in the three specimens of Chirotherium. Upon comparing the 
footstep from Hessberg with that from Storeton, it will be found, that 
the former is thicker and more clumsy than the latter; that the sole 
is shorter and broader, and the toes wider and longer. The most 
important discrepancy, however, is in the position of the thumb, 
which is placed much nearer the heel in the Hessberg specimens 
than in those from Storeton. The cast from near Tarporley re- 
sembles the latter more than the former; it nevertheless differs con- 
siderably in the proportion of the breadth to the length of the sole, 
which is greater; and in the proportions of the length of the toes to the 
length of the sole, which is less than in the Storeton specimens. It 
is also distinguished by the greater divergence of the toes from each 
other. From these differences and the gigantic size of the Tarporley 
specimen, the author conceives that the animal which made the im- 
pression was a distinct species; and he proposes for it, in compli- 
ance with the adage ex pede Herculem, the name of Chirotherium 
Herculis. 
