OF CONCHOLOGY. 



149 



Plate 13 



Plate 14 



Explanation of Plates 13 and 14. 



fig. 1. Young shell of Pugnellus hamulus, Gabb. 



2. Adult P. hamulus, Gabb. 



3. Very old P. hamulus, Gabb. 



4. 5. P. {Gfymnarus) manubriatus, Gabb. 



6. Pterocera (Phyllocheilus) speciosa, D'Orb. 



7. Isopleura curvilirata, Conrad. 



8. Gyclomolops laevigata, Mellv. 



9. Q alyptraphorus velatus, Conrad. 



10. 0. trinodiferous, Conrad. 



11. Aporrhais (Groniocheila) liratus, Conrad, 

 fig. 12. " " " " 



13. Anchura abrupta, Conrad. 



14. A. falciformis, Gabb. 



15. Helioaulax ornata, d'Orb. 



16. Dicroloma Lorieri, d'Orb. 



17. D. trifida, Miinster. 



18. 19. Tessarolax distorta, Gabb. 



20. Pterooerella Tippana, Conrad. 



21. Loxotrema turrita, Gabb. 



