PLATE IX. 



PAGE 



Fig. 1. Callianassa Stimpsonii. 57 



Natural size. 



a. Three segments of the abdomen, from Clayton. 



b. A fragmentary hand from Chico Creek. 



c. Part of a hand, from the same specimen as Fig. a. 



Fig. 2. Belemnites impressus. 58 



Natural size. 

 2 a. A section across the middle of Fig. 2. 



Fig. 3. Nautilus Texanus ? 59 



§ Natural size. 



a. Side view. 



b. Front view. 



