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Fig. 9. Sections of Spirifers. 



1-4. Spirifer asper (Hall). Sections 3 mm., 4 mm., 4^ mm., and 5.3 mm. from 



the beak. 

 5-7. Spirifer euryteines Hall. Sections 1)4. mm., 4 mm., and 7.3 mm. from the 

 beak. 

 10. Syringothyris hannibalensis (Swallow). Section 9 mm. from the beak. 

 11-14. Syringothyris occidentalis (Swallow). Sections 3 mm., 4 mm., 5 mm. and 

 6 mm. from the beak. 



Spirifer annae Swallow. Section 1 mm. from the beak. 

 Spirifer subvaricosus Hall and Whitfield. Section 2 mm. from the beak. 



Genus Reticularia McCoy 



Reticularia fimbriata (Conrad) 

 Plate 16, -figures 1 and 2. 

 1842. Delthyris fimbriatus Conrad, Jour. Acad. Nat. Sci., Phila., VIII, p. 263. 

 1897. Reticularia fimbriata Schuchert, Bull. U. S. Geol. Surv., 87, p. 342. 

 1901. Reticularia fimbriata Kindle, Ind. Dept. Geol. Nat. Res., 25th Ann. Rept., p. 



651-652, pi. 7, fig. 11. 

 1903. Spirifer fimbriatus Clarke, N. Y. State Mus., Bull. 65, p. 316. 

 1909. Reticularia fimbriata Grabau and Shimer, North American Index Fossils, I, 

 p. 338, figs. 431a, b. 



1911. Reticularia fimbriata Cleland, Wisconsin Geol. and Nat. Hist. Surv., Bull. 21, 

 p. 82, pi. 17, figs. 1-2. 



1912. Reticularia (cf.) fimbriata Kindle, Bull. U. S. Geol. Surv., 508, p. 82. 



1913. Spirifer (Reticularia) fimbriatus Prosser and Kindle, Maryland Geol. Surv., 

 Middle and Upper Devonian, pp. 197-198, pi. 19, figs. 10-12. 



Hall's description — "Shell transversely subelliptical, gibbous; hinge line less than 

 the width of the shell; cardinal extremities rounded. 



