Manchester Memoirs, Vol. liii. (1909), No. %^. 17 



{Ichniujn sphaerodactylum, Pabst, from Tambach, 

 Thiiringia), and Fig. 33 {Baropus lentiis. Marsh, from the 

 Coal Measures of Kansas). It is interesting to note here 

 that Mr. Varty Smith has obtained from the " Yoredale" 

 Sandstone, near Penrith, a print which closely resembles 

 the IcJiniuni spliaerodactylum, when that print is preserved 

 so as to show only the tips of the digits. 



The remaining figures on Plate TV., should be useful 

 for future comparison. Meanwhile it seems clear, that 

 the relationship of the Permian series of footprints is 

 likely to prove much closer with those from the 

 Carboniferous, than with the Triassic forms — a fact quite 

 in keeping with the general relationships of the 

 Carboniferous, Permian and Triassic faunas. 



The present communication is necessarily of a 

 preliminary character, and is mainly put forward with a 

 view to stimulating future research, and to show that 

 fossil footprints are worthy of more than summary 

 dismissal with a quotation from Longfellow. 



