340 MEMOIRS OF THE CARNEGIE MUSEUM. 



1909a Ortmann, A. E. The Breeding Season of Unionidse in Pennsylvania (Nautilus, 



XXII, 1909, pp. 91-95; 99-103). 

 19096 Ortmann, A. E. A preliminary List of the Unionidae of Western Pennsylvania, 



with New Localities for Species from Eastern Pennsylvania (Annals Carnegie 



Museum, V, 1909, pp. 178-210). 

 1909c Ortmann, A. E. Unionidse from an Indian Garbage Heap (Nautilus, XXIII, 



1909, pp. 11-15). 

 1910 Ortmann, A. E. A New System of the Unionida; (Nautilus, XXIII, 1910, pp. 



114-120). 

 1911a Ortmann, A. E. The Anatomical Structure of Certain Exotic Najades compared 



with that of the North American Forms (Nautilus, XXIV, 1911, pp. 103-108; 



114-120; 127-131). 

 19116 Ortmann, A. E. Monograph of the Najades of Pennsylvania (Memoirs Car- 

 negie Museum, IV, 1911, pp. 279-347). 

 1912 Ortmann, A. E. Notes upon the FamiHes and Genera of the Najades (Annals 



Carnegie Museum, VIII, 1912, pp. 222-365). 

 1913a Ortmann, A. E. The Alleghenian Divide, and its Influence upon the Fresh- 

 water Fauna (Proceedings American Philosophical Society, LII, 1913, pp. 287- 



390). 

 19136 Ortmann, A. E. Studies in Najades (Nautilus, XXVII, 1913, pp. 88-91). 

 1914 Ortmann, A. E. Studies in Najades (Nautilus, XXVIII, 1914, pp. 41-47; 



65-69; 129-131). 

 1869 Perkins, G. H. Molluscan Fauna of New Haven (Proceedings Boston Society of 



Natural History, 1869, p. 154). 

 1894 PiLSBRY, H. A. Critical List of Mollusks Collected in the Potomac Valley 



(Proceedings Academy of Natural Sciences of Philadelphia, 1894, pp. 11-30). 

 1901 PiLSBRY, H. A. Alasmidonta marginata (Say) (Nautilus, XV, 1901, pp. 16-17). 

 1876 Pratt, W. H. List of Shells at Davenport, Iowa (Proceedings Davenport Academy 



Natural Sciences, I, 1876, pp. 165-167). 

 1820 Rafinesque, C. S. Monographic des Coquilles Bivalves et Fluviatiles de la 



Riviere Ohio (Annates Generates des Sciences Physiques, Bruxelles, V, 1820) 



(Reprinted 1912, by the University of Notre Dame, Indiana). 

 1864-1870 Reeve, L. A. Conchologia Iconica, XVI, Unio, 1864-1868; XVII, Ano- 



donta, 1867-1870 (continued by Sowerby, G. B.). 

 1899 Rhoads, S. N. On a Recent Collection of Pennsylvania Mollusks from the Ohio 



River System below Pittsburgh (Nautilus, XII, 1899, pp. 133-137). 

 1904 Rhoads, S. N. A Glimpse at the Shell Fauna of Delaware (Nautilus, XVIII, 



1904, pp. 63-67). 

 Richardson, R. E. (See Forbes & Richardson.) 



