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 FiouRK 1&. Orthaulax pugnax (B.eil'pria) Dall . "Silex beds" of Tampa formation. After Dall, 1915, pi. 15, 



fig. 5. U. S. Nat. Mu9. Catalogue No. 165100 28 



lb. Orthaulax pugnax. (Heilprin) Dall. "Silex beds" of Tampa formation. After Dall, 1915, pi. 15, 

 fig. 10. Same iudi\'idual as shown in figure la. 

 2. Orthaulax pugnax (Heilprin) Dall. Blue Springs, Ga. U. S. Nat. Mus. catalogue No. 115747. 

 3a. Orthaulax pugnax (Heilprin) Dall. Antigua. After Cooke, 1919, pi. 2, fig. 4. U. S. Nat. Mus. 



catalogue No. 166984. 

 3b. Orthaulax pugnax (Heilprin) Dall. Axial section, X 2, of individual shown in figure 3a. The 

 discontinuity in the anterior part of the columella is not due to resorption of the walls, but to 

 the section having been cut at a small angle to the plane of the axis. 

 4a. Orthaulax pugnax (Heili)rin) Dall. Type, from "silex beds" of Tampa formation. After Heil- 

 prin, 1887, pi. 15, fig. 36. 

 4b. Orthaulax pugnax (Heilprin) Dall. Type. After Heilprin, 1887, pi. 15, fig. 36a. 

 5. Orthaulax gahhi Dall. Young individual from Chipola marl of Florida. After Dall, 1890, pi. 12, 



fig. 5. U. S. Nat. Mus. catalogue No. 112218 29 



6a, b. Orthaulax gahhi Dall. Type, X 0,85, from Chipola marl of Florida. After Dall, 1890, pi. 12, 

 figs. 5a, 5b. U. S. Nat. Mus. catalogue No. 112218. 

 7. Orthaulax gabbi Dall. Bailey's Ferry, Fla., station 3419. 



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