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NEW YORK STATE MUSEUM 



been a long time after their deposition — the shell structure 

 of a mollusk would remain to the present time. 



The manner in which several of the trails approach in a 

 common direction and end close to each other in sedentary im- 

 pressions is exactly what takes place in the case of the trails 

 of many gregarious aqueous forms, which crawl up a beach or 

 a partly exposed sand bar and rest on the dry sand. The pres- 

 ence of the trails leading to the sedentary impressions is con- 

 clusive proof that wave action was not concerned here in strand- 

 ing the animals. The modern lirnulus, for instance, in the 

 breeding season during the month of May on the Massachusetts 

 coast, comes ashore in shallow bays, several individuals crowd- 

 ing the shore at the same place. The difference in the size of the 

 terminal impressions and the convergence of the trails at Mooers 

 suggest that more than one individual was concerned in mak- 

 ing the trails here described. 



Other occurrences of Climactichnites noted in 1902. Small partly 

 effaced trails of Climactichnites were seen on the glaciated sur- 

 face of the Potsdam sandstone in the road gutter on top of Covey 

 hill, in Canada, about two miles west of the Covey Hill post- 

 office. The sandstone is exposed there for a long distance in the 

 trenches on either side of the road. These tracks were seen on 

 the north of the road. 



A drifted block of Potsdam sandstone carrying narrow, 

 straight, cross-ridged Climactichnite trails without a central 

 ridge was found on the Mooers quadrangle near the Chazy river 

 in the longitude of Irona N. Y. This specimen was sent to the 

 State Museum. 



