MA LA SPINA GLACIER. 245 



ing. Among the shells collected in the subglacial clay Dr. W. 

 H. Dall has identified the following; 



Cardmm gronlaiidicwn, Gronl. 



Cardium islandicum, L. 



Keiuierlia grandis, Dall. 



Leda fossa, Baird. 



Macoma sabtdosa, Spengler. 

 Similar shells, all of living species, were previously found at 

 an elevation of five thousand feet on the crest of a fault scarp at 

 Pinnacle pass, showing that recent elevations of land much greater 

 than the one recorded in the marine clay just noticed have 

 taken place. In fact there are several indications that the coast 

 in the vicinity has been rising and that the same process is still 

 continuing. j^^^^^^ ^_ Russell. 



