8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



Niviperca Whitley, 1951, Proc, Royal Zool. Soc. New South Wales, 

 1949-50, p. 68. A replacement name for Nivicola Jordan and 

 Evermann preoccupied by Nivicola Hodgson, 1844, Aves. Takes 

 the same type-species as Nivicola Jordan and Evermann, Poe- 

 cilichthys borealis Jordan, 1844 {= Boleichthys exilis Girard, 1859). 



Nothonotus Agassiz in Putnam, 1863, Bull. Mus. Comp. Zool., vol. 1, 

 p. 3. Type-species Etheostoma maculatum Kirtland, 1840, by 

 subsequent designation of Jordan and Gilbert 1877, p. 93. 



Oligocephalus Girard, 1859, Proc. Acad. Nat. Sci. Philadelphia, vol. 11, 

 p. 67. Type-species Boleosoma lepida Baird and Girard, 1853, 

 by subsequent designation of Vaillant (1873, p. 90). 



Percina Haldeman, 1842, Jo urn. Acad. Nat. Sci. Philadelphia, vol. 8, 

 p. 330. Type-species Perca nebulosa Haldeman, 1842 (=Sciaena 

 caprodes Rafinesque, 1818), by monotypy. 



Pileoma DeKay, 1842, Nat. Hist. New York Zool., vol. 1, pt. 4, p. 16. 

 Type-species Pileoma semijasciata DeKay, 1842 {=Sciaena 

 caprodes Rafinesque, 1818), by monotypy. 



Plesioperca Vaillant, 1873, Nouv. Arch. Mus. Hist. Nat. Paris, vol. 9, 

 p. 36. Type-species Plesioperca anceps Vaillant, 1873 {=Hadrop- 

 terus nigrofasciatus Agassiz, 1854), by monotypy. 



Poecilichthys Agassiz, 1854, Amer. Jo urn. Sci. and Arts, vol. 7, p. 304. 

 A replacement name for Poecilosoma Agassiz, 1850, preoccupied 

 by Poecilosoma Huebner, 1819, Lepidoptera ; Po^aZosoma Stephens 

 1829, Hemiptera; Poecilosoma Newman, 1838, Coleoptera. Takes 

 the same type-species as Poecilosoma Agassiz, Etheostoma variatum 

 Kirtland, 1838. 



Psychromaster Jordan and Evermann, 1896, U.S. Nat. Mus. Bull. 47, 

 p. 1099. Type-species Etheostoma tuscumhia Gilbert and Swain, 

 1887, by original designation. 



Rajinesquiellus Jordan and Evermann, 1896, U.S. Nat. Mus. Bull. 47, 

 p. 1082. Type-species Aplesion pottsii Girard 1859, by original 

 designation. 



Rheocrypta Jordan, 1877, U.S. Nat. Mus. Bull. 10, p. 9. Type-species 

 Rheocrypta copelandi Jordan, 1877, by monotypy. 



Rhothoeca Jordan, 1885, Ann. Rept. Comm. Fish and Fish, for 1885, 

 p. 868. Substitute name for Nanostoma Putnam erroneously 

 regarded as preoccupied by Nannostomus Giinther and taking the 

 same type-species Poecilichthys zonalis Cope, 1869. 



Richiella Coker, 1927, Copeia, no. 162, p. 18. Substitute name for 

 Richia Coker preoccupied by Richia Grote, 1887, Lepidoptera. 

 Takes the same type-species as Richia Coker, Richia brevispina 

 Coker, 1926 {= Etheostoma fiabellaris Rafinesque, 1819). 



