282 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 57 



DESCRIPTION OF PLATE 38 



PAGE 



Climactichnitcs yonngi (Chamberlin). (See pi. 39) 259 



Fig. I. (Reduced one-sixth.) Impression on beach sand by the lower 

 surface of the animal making the Climactichnites trails. A 

 portion of the trail is shown, also the forward arching lines 

 on the transverse ridges made by the backward push of the 

 animal in creeping forward. These are well shown by fig. 

 2, pi. 39. U. S. National Museum, Catalogue No. 58544. 

 The specimen represented is from locality (99c) Upper Cambrian, 

 near New Lisbon, Wisconsin. 



