GASTROPODA— VOLUTIDJE. 



791 



Pamunkey of Maryland, etc. ; Chickasawan and Claibornian of 

 Alabama, Texas, etc. 



594. V. sayanus (Conrad). (Fig. 1157.) Eocenic. 

 Shoulder angle rather blunt, ribs extending over it, but dying 



out on shoulder and short distance below the angle on body whorl ; 

 surface with spirals which cancellate the ribs ; columella with four 

 plications, one of which is obsolete. 

 Claibornian of Alabama. 



595. V. rugatus (Conrad). (Fig. 11 58, a.) Eocenic. 

 Whorls round, with rounded, strong and rather distant ribs 



crossed by compound spirals ; callus of inner lip reaching only part 

 way over the whorl; columella with three folds, the middle one 

 obsolete. 



Midwayan of Texas and Alabama. 



596. V. limopsis (Conrad). (Fig. 11 58, b.) Eocenic. 



Fig. 1 158. a, Volutilithes rugatus, left; 

 b, V. limopsis, right. (After Harris.) 



P'lG. 1 1 59. Volutomorpha conradi. 

 (After Whitfield.) 



Like the preceding, but with more numerous, narrower and 

 sharper ribs cancellated and spinulated by strong, sharp spirals, 

 especially marked on the ribs. 



Midwayan and Claibornian of Texas and Alabama. 



