CEPHALOPODA— AMMONOIDEA. 



175 



Fig. 1425. Pachydiscus suciaensis, with cross section of body whorl, X %> ^^^^ 

 suture natural size. (After Gabb. ) 



Fig. 1426. Pachydiscus suciaensis, var., X t\' with surface enlargement and 

 septum . ( After Gabb. ) 



