Manchester Memoirs, Vol. /t/. (191 1), No. 8. 17 



LITERATURE. 



Beecher. "Studies in Evolution." 



Grabau, 1904. " Phylogeny of Fusus and its Allies,'' Smith- 

 sonian Institution. 



Jackson, R. T., 1S89. Phylogeny of the Pelecypoda. Mem. 

 Bosto?i. Sac. Nat. Hist. 



Latter, 189 i. "Notes on A/iodon and Unio.'" Proc. Zoo/. Soc, 

 London. 



Lea, 1870. "Synopsis of the Family Unionidffi," Philadelphia. 



Marshall, W, B., 1890. "Beaks of the Unionidai inhabiting 

 the Vicinity of Albany, N.Y." Biili. iV. Y. State Mus., 

 vol. 2, no. 9. 



Neumayr, 1889. "iJber die Herkunft der Unionidem," Wien. 



Simpson, T., 1892. "The Unionidce of Florida and the 

 S.E. States." Proc. U.S. Nat. Hist. Mus., vol. 15. 



1893. "On Fossil Unios and other Freshwater shells 



from the Drift at Toronto, Canada, with a Review of 

 the Distribution of the Unionidse of N.E. America." 

 Froc. U.S. N'at. Hist. AIiis., vol. 16. 



— — 1895. "Description of 4 New Triassic Unios from the 

 staked Plains of Texas." Froc. U.S. A'at. Hist. Mus , 

 vol. 18. 



1900. "Synopsis of the Naiades." Froc. U.S. 



Nat. Mus.., vol. 22. 



1903. "On the Relationship and Distribution of 



N. Am, Unionidte, with Notes on the West Coast 

 species." Am. N'at.^ vol. 28, no. 316, p. 353. 



