44 



Mystacina Gray, 1843, not Mystacinus Boie, 1822; replaced by Mysta- 



cops Lydekker, 1891. 

 Nanomys Marsh, 1889, not Nannomys Peters, 1876; replaced by Nano- 



myops Marsh, 1892. 

 Necroma?itis Weithofer, 1887, not Necromantes Gislet, 1848; replaced 



by Necronycteris Palmer, 1903. 

 Notocetus Moreno, 1892, not Notiocetus Ameghino, 1891; replaced by 



Diochotickus Ameghino, 1894. 

 Octotomus Cope, 1885, not Octotamus Tischbein, 1881. 

 Olygodon Ameghino, 1883, not Oligodon Boie, 1827. 

 Oromeryx Marsh, 1894, not Oreomeryx Mercat, 1891. 

 Pachypleurus Brandt, 1873, not Pachypleura White, 1853; replaced 



by Archceocetus Singow, 1898, and by Pristinocetus Trouessart, 



1898. 

 Pachyura Selys-Longchamps, 1839, not Pachyurus Agassiz, 1829. 

 Pagophilus Gray, 1844, not Pagophila Kaup, 1829. 

 Palœothentes Ameghino, 1887, not Palœoteuthis D'Orbigny, 1847; re- 

 placed by Epanorthus Ameghino, 1889. 

 Parthenopa Rafinesque, 1814, not Parthenope Fabricius, 1798. 

 Paurodus Schultze, 1897, not Paurodon Marsh, 1887. 

 Pelagios F. Cuvier, 1824 (emended to Pelagius F. Cuvier, 1826), not 



Pelagici Peron, 1809; replaced by Rigoon Gistel, 1848. 

 Peramus Owen, 1871, not Peramys Lesson, 1842. 

 Phyllorrhina Bonaparte, 1837, not Phyllorhina Leach, 1816. 

 Platuprosopus Filhol, 1888, not Platyprosopus Mannerheim, 1830; re- 

 placed by Strongidognathus Filhol, 1890. 

 Platyceros Gray, 1850, not Platyceras Conrad, 1837. 

 Platycranus Kastschenko, 1901, not Platycrana Gray, 1836, nor Platy- 



crania Burmeister, 1838, nor Platycranion Jan, 1863. 

 Platyrrhinus De Saussure, 1860, not Platyrhinns Clairville, 1798. 

 Polyacrodon Roth, 1899, not Polyacrodus Jaekel, 1889. 

 Polycladus Pomel, 1854, not Polyclados Brandt, 1835. 

 Pontoporia Gray, 1846, not Pontopareia Kroyer, 1842; replaced by 



Stenodelphis Gervais, 1847. 

 Prionodon Horsefield, 1824, not Priodon Cuvier, 1822; replaced by 



Linsang S. Müller, 1839. 

 Procerus Serres, 1838, not Proceros Rafinesque, 1820; replaced by 



Procervus Blain ville, 1840. 

 Protogonia Cope, 1881, not Protogonius Hübner, 1816; replaced by 



Euprotogonia Cope, 1893. 

 Prototomus Cope, 1874, not Prototoma Heer, 1852. 

 Pselaphoii Gray, 1870, not Pselaphus Herbst, 1792. 



