R. L. Hoodie — Vertebrate Footprints. 33 



Paleozoic times, of a group of animals which were abundant 

 and highly developed in later geological time. 



Measurements of the footprints. 

 Small footprint. 



Length of middle toe and heel impression ] 35 mm 



Length of side toe 65 



Width of heel impression . 18 



Width of impression of middle toe ■ 11 



Larger footprint with portion of heel impression eroded. 



Length of middle toe and heel impression as preserved 135 



Estimated length _ 170 



Length of side toe impression 90 



Width of heel impression 20 



Width of toe impression 15 



University of Kansas, Lawrence, Kansas. 



mm 



Am. Jour. Sci.— Fourth Series, Vol. XXXV, No. 205.— January, 1913. 



