STANTON I THE MARINE CRETACEOUS INVERTEBRATES. 



EXPLANATION OF PLATE V. 



PAGE 

 ASTARTE PERALTA StantOD .......... 22 



Fig. i. Hinge of right valve. 



Fig. 2. Exterior of same specimen. 

 ASTARTE POSTSULCATA Stanton ......... 23 



Fig. 3. Interior of thin right valve. 



Fig. 4. Exterior of a similar valve. 



Fig. 5. Dorsal view of an example with thicker valves. 



Fig. 6. Hinge of a thick left valve . 



Fig. 7. Exterior of same specimen. 

 All figures on this plate are of natural size. 



(VOL. iv) 



