308 REFERENCE TO PLATES, VOL. XV. 



FIGURE PAGE 



4. Ccelocentrum turris Pfr. Specimen 36 



5. Coelocentrum turris Pfr. Conchyl. Cab 36 



6. 7. Coelocentrum tomacella Morel. Conchyl. Cab 38 



8. Coelocentrum tomacella var. rufescens Mart. Bio- 



logia -. , 40' 



9, 10. C oelocentrum tomacella var. attenuatum Pfr. 



Conch. Cab 40 



11, 12. Ccelocentrum tomacella var. clava Pfr. Conch. 



Cab 39 



13. Coelocentrum tomacella var. clava Pfr. Moll. Mex. . . 40 



14. Coelocentrum tomacella var. clava Pfr. After 



Strebel 39 



PLATE 13. 



15. 16. Coelocentrum irregulare Gabb. Pilsbry, del 51 



17-19. Coelocentrum gabbi Pils. Pilsbry, del 54 



20-22. Coelocentrum eisenianum Pils. Pilsbry, del 55 



PLATE 14. 



21-23. Coelocentrum tomacella Morel. Specimen 38 



24, 25. Ccelocentrum tomacella, sculpture of fourth whorl 



up, and of last whorl. Pilsbry, del 38 



26, 27. Coelocentrum tomacella var. clava Pfr. Specimen. 39 

 28-32. Coelocentrum arctispira ( ?) var. estefaniae Pils. 



After Strebel 43 



33. Coelocentrum arctispira Pfr. P. Z. S., 1860 42 



34. Coelocentrum arctispira. Pfr. Conch. Icon 42 



35. 36. Coelocentrum arctispira Pfr. Moll. Mex 42 



PLATE 15. 



1, 2. Holospira imbricata Martens. Malak. Bl 103 



3. Holospira tryoni var. gealei H. Ad. P. Z. S 85 



4, 5. Holospira microstoma Pfr. Moll. Mex 102 



6-8. Holospira claviformis Mart. (= elizabethae Pils.) 



Biologia 100 



9-14. Holospira elizabethae Pilsbry. Pilsbry, del 99 



15. Holospira elizabetha Pilsbry. J. de C., 1892 99 



16, 17. Holospira cretacea Pfr. Moll. Mex 104 



18-20. Holospira teres Mke. Phil., Abbild 104 



21, 22. Holospira teres var. minor Mts. J. de C., 1892. . 104 



PLATE 16. 



1, 2. Holospira arizonensis Stearns. Proc. U. S. Nat. 



Mus. 81 



