Plate 40. 



Fig. 1. Poliimorphina communis. X40. Front view. D2112. 



2. Poliimorphina communis. X40. Specimen attached to fragment of 



rock. D2639. 



3. PoJymorphina equalis. X30. Front view of fistulose specimen. 



D2395. 

 4,5. Polymorphina lanccolata. X40. Side views. D2174. 



6. Polymorphina pulchella. X50. Front view. D2420. 



7. Polymorphina lactea, var. ohlonga. X120. Side view, "depauper- 



ate." After Heron-Allen and Earland. 



8. Polymorphina lactea, var. ohlonga. a. front view: h. side view. 



After Williamson. 



9. Polymorphina concava. Views of opposite sides. After William- 



son. 



10. Polymorphina flintii. X25. Front view. D2415. 



11. Polymorphina ovata. X25. Front view. After H. B. Brady. 



12. Polymorphina ovata. X25. a, front view; h, apertural view. 



After H. B. Brady. 

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