Volume 53 



Kummel, Bernhard Jr. 



1943 The Thaynes Formation, Bear Lake 



Valley, Idaho. 1 



1948 Environmental significance of 



dwarfed cephalopoda. . 2 



194S Geological reconnaissance of the 



Contamana region, Peru. 3 



1950 Stratirruphic studies in north- 

 ern Peru. 4 



1952 A classification of the Triassio 

 ammonoids. 5 



1953 The Triassic of South America. 6 



1953 Lover Cretaceous nautiloids from 



Texas. 7 



1953 Lover Triassio Salt Range 



nautiloids. 8 



1953 The ancestry of the Family 

 Nautilidae. 9 



1954 Lover Turonian ammonite a from 



Texas and Mexico* 10 



1954 Jurassic nautiloids from western 



North America. 11 



1954 Status of invertebrate paleo- 

 ntology, 1953. V. Molluscai 

 Cephalopoda. 12 



1955 Experiments on relative stream- 

 lining of coiled cephalopod shells. 13 



