PLATE LXXIII. 



POLYMORPHINA. 



Diani. Page 



Figure 1. — Polymorphina problema, d'Orbigny, . x 40 568 



b, Oral aspect. 



,, 2-4. — Polymorphina oblonga, d'Orbigny, . . . x 40 569 



b, Oral aspect. 



,, 5-8. — Polymorphina rotundata, Bornemarm, sp., . x 30 570 



b, b, Oral aspect. 



,, 9, 10. — Polymorphina myristiformis, Williamson, . . > 



b, Oral aspect. 



,, 11-13. — Polymorphina regina, Brady, Parker, and Jones, . > 



b, Oral aspect. 



,, 14. — Polymorphina lactea. fistulose form, . . > 



,, 15. — Polymorphina sororia, fistulose form, . . > 



16. — Polymorphina gibba, fistulose form, . . > 



,, 17.- — Polymorphina compressa, fistulose form, . . > 



,. 18, 19. — Polymorphina longicollis, Brady, . . > 



b, Oral aspect. 



