STANTON : THE MARINE CRETACEOUS INVERTEBRATES. 
EXPLANATION OF PLATE IV. 
PAGE 
Pecten (Camptonectes) pueyrrydonensis Stanton . . . , . 12 
Fig. 1. Right valve. Natural size. 
Pecten octoplicatus Stanton ......... 14 
Fig. 2. Right valve with the ears partly restored from another example. 
Enlarged two diameters. 
Fig. 3. Left valve, similarly enlarged. 
Mytilus argentinus Stanton ......... 16 
Fig. 4. Right valve. Enlarged two diameters. 
Pecten argentinus Stanton ......... 13 
Fig. 5. Left valve. Natural size. 
Avicula (Oxytoma) tardensis Stanton ....... 14 
Fig. 6. A small left valve enlarged three diameters to show details of 
sculpture. From a wax cast of a natural mold. 
Fig. 7. An average left valve, natural size, with most of the shell and 
posterior ear removed. 
Nucula pueyrrydonensis Stanton ........ 17 
Fig. 8. A small left valve from a wax cast of a natural mold. 
Fig. 9. Another left valve. 
Solecurtus? limatus Stanton . 24 
Fig. 10. Left valve. 
Leda? corbuliformis Stanton , . 18 
Fig. 1 1. Left valve. 
Tapes? patagonica Stanton ......... 23 
Fig. 12. Dorsal view of type, enlarged two diameters. 
Fig. 13. Left valve of same. 
Corbula crassatelloides Stanton ........ 26 
Fig. 14. Right valve, enlarged three diameters. 
Fig. 15. Left valve, enlarged three diameters. 
Trigonia heterosculpta Stanton 20 
Fig. 16. Young specimen showing concentric sculpture of beak and 
beginning of posterior series of costas. 
Fig. 17. Half-grown specimen showing further development of costae. 
Fig. 1 8. Larger specimen with anterior sculpture obscured by weathering. 
Trigonia subventricosa Stanton 18 
Fig. 19. Dorsal view of the type. 
Fig. 20. Left valve of same. 
All figures of natural size unless otherwise stated. 
(vol. iv) 
