116 TJ. S. BUREAU OF FISHERIES 



823. Algansea dugesi Bean. 



Central Mexico, in streams tributary to Rio de Lerma, Lake Yuriria in 



Guanajuato. 

 Algansea dugesi Bean, Proc. U. S. Nat. Mus., XV, 1892, 283, Lake 



Yuriria, Guanajuato, Mex. 

 ?Algansea tarascorum Steindachner, Einige Fischarten Mexicos, 1895, 



11, pi. 3, figs. 2-2c, Lake Patzcuaro, Mex. 



824. Algansea lacustris Steindachner. 



Lake Patzcuuru, Jalisco, Mexico. 



Algaiisea lacustris Steindachner, Einige Fischarten Mexicos, 1895, 10, 

 pi. 3, figs. 1 and 16, Lake Patzcuaro. 



825. Algansea sallaei (Gvinthcr). 



Streams of central Mexico. 



Ceratichthys sallsi Giinther, Cat., VII, 1868, 484, Cuernavaca, Mex. 

 Zophendum australe Jordan, Proc. U. S. Nat. Mus., II, 1879, 300, Lake 

 Tupataro, Mex., Rio Lerma. 



826. Algansea rubescens Meek. 



Lake Patzcuaro, Michoacan. 



Algansea rubescens Meek, Field Col. Mus., Zool., V, 1905, 46, fig. 9, 

 Lake Patzcuaro. 



827. Algansea stigmatura Regan. 



Northern Mexico. 



Algansea stigmatura Regan, Biol. Central!- Amer., 1907, 152, Tab. XXV, 

 fig. 2, Rio Grande de Santiago, Jalisco. 



828. Algansea affinis Regan 



Upper tributaries of Rio Lerma and Rio Panuco, Mexico. 

 Algansea affinis Regan, Biol. Centrali-Amer., 1907, 151, Tab. XXV, 

 fig. 1, Aguas Carentes, Salamanca, and San Juan del Rio, Mexico. 



Genus 305. POGONICHTHYS Girard. 



Pogonichthys Girard, Proc. .Vcad. Nat. Sci. Phila., VII, 1854, 136 (P. 



insequilohus Baird and Girard — Lewciscws 7nacrolepidotus Ayres). 

 Syuvmetrurus Jordan, Hayden's Geol. Surv. Terr., IV, 1878, 788, 



(Pogonichthys argyrciosus Girard); young. 



829. Pogonichthys macrolepidotus (Ayres). Splittail. 



Streams of central California; very common in the Sacramento and 



San Joaquin Rivers. 

 Leuciscus macrolepidotus Ayres, Proc. Calif. Acad. Nat. Sci., I, in Placer 



Times and Transcri])t, IVIay 30, 1854, San Francisco, Calif. 

 Pogonichthys iniequilobus Baird and Girard, Proc. Acad. Nat. Sci. 



Phila., VII, 1854, 136, San Joaquin Valley, Calif. 

 Pogonichthys argyrciosus Girard, loc. cit., 153, Presidio, Calif. 



Genus 306. MARGARISCU3 Cockerell. 



Margariscus Cockerel!, Proc. Biol. Soc. Wash., XXII, 1909, 217 [Clino- 



stomus margarita Cope). 

 As a small barbel is normally present in this genus and i)laced above 



the tip of the maxillarj^, as in Se^nolilus, the genus must l)e placed 



near Leucosomus. 



830. Margariscus margarita (Cope). Minnow; Goldthread shiner; Pearl 



minnow. 

 Lake Erie, south to James River and headwaters of the Kanawha. 

 Clinostomus margarita Cope, Trans. Amor. Phil. Soc, XIII, 1866, 377, 



Conestoga River, Lancaster, Pa. 



831. Margariscus nachtriebi 2^ (Cox). 



North Dakota to New Brunswick. 



Leuciscus nachtriebi U. O. Cox, Rept. U. S. Fish Com., XX, 1894 



(1896), 615, Minnesota, Mille Lacs Lake. 

 Couesius plunibeus ruhrilateralis Philip Cox, Bull. Nat. Hist., 2, 1901, 



42, Miramachi, Canada. 

 Leuciscus carlcloni Kendall, Bull. U. S. Fish Com., XXII, 1902, 357, 



fig. 1, Penobscot River, Me. 



""With much doubt we leave this specie-s (M. nachtriebi) with Margariscug. The actual relation oJ 

 this and other related forms is yet to be determined." (Jordan.) 



