98 U. S. BUREAU OF FISHERIES 



Genus 255. HEMIGRAMMUS Gill. 



Hemigrammus CiU, Ann. Lye. Nat. Hist. N. Y., VI, 1858, 420 (ff. 



unilineatits Gill). 



680. Hemigrammus unilineatus (Gill). 



Streams of Trinidad. 



Pcecilarichthys unilineatus Gill, Ann. Lye. Nat. Hist. N. Y., VI, 1854, 

 420, Trinidad. 



Genus 256. CREAGRUTUS Giinther. 



Crcagrutus Gi'inthor, Cat., V, 1864, 339 {Leporinus mulleri Giinther). 



681. Creagrutus notropoides Meek and Hildebrand. 



Rio Chagres, Panama. 



Creagrutus notropoides Meek and Hildebrand, Field Mus. Nat. Hist., 

 Zool., X, 1912, 68, Rio Indio, Chagres basin. 



682. Creagrutus simus Meek and Hildebrand. 



Rio Tuyra Basin, Panama. 



Creagrutus simus Meek and Hildebrand, Field Mus. Nat. Hist., Zool., 

 X, 1913, 8."), Rio Cupe, Cituro, Panama. 



Genus 257. RGEBOIDES Gunther. 



Raboides Giinther, Cat., V, 1864, 347 (Epicyrtus microlepis Reinhardt). 



683. Roeboides guatemalensis (Giinther). 



Rio Chagres and streams of Guatemala. 



Annryrtus guatemalensis Giinther, Cat., V, 1804, 347, Rio Chagres; 

 Huamuchal. 



684. Roeboides salvadoris Hildebrand. Plateado; Sardina; Alma seca; 



Ulmina. 

 Lakes Guija and Metapan and Rio Sucio and Lempa, El Salvador. 

 Roeboides salvadoris Hildebrand, Bull. U. S. Bur. Fish., XLI, 1925, 

 246, fig. 9, Rio Sucio, Sitio del Nino. 



685. Roeboides occidentalis Meek and Hildebrand. 



Pacific slope of Panama and southward. 



Roeboides occidentalis Meek and Hildebrand, Field Mus. Nat. Hist., 

 Zool., X, 1916, 293, PI. XXIII, Rio Cardenas, Corozal, Panama. 



Genus 258. BRYCON Muller and Troschel. 



Brycon Miiller and Troschel, Horse Ichth., I, 1845, 15 (B. falcalus 



Miiller and Troschel). 

 Chalcinopsis Kner, Sitzungsb. Akad. Wiss. Miinchen, 1863, 226 (C. 



striatulus Kner). 

 Megalobrycon Giinther, Proc. Zool. Soc. Lond., 1869, 423 {Brycon 



ccphalus Giinther). 



686. Brycon striatulus (Kner). 



Rio Chagres and streams about Panama. 



Chalcinopsis striatulus Kner, Sitzungsb. Akad. Wiss. Miinchen, 1863, 



226, Panama. 

 Chalcinopsis chagresensis Kner, loc. cit., 1863, 226, Rio Chagres. 



687. Brycon guatemalensis Regan. 



Brycon guatoiudensis Regan, Biol. Centrali-Amer., 1908, 168, lakes and 

 streams of Guatemala and Nicaragua. 



688. Brycon petrosus Meek and Hildebrand. Pipon. 



Ciiagres River basin, Atlantic slope of Panama. 



Brycon petrosus Meek and Hildebrand, Field Mus. Nat. Hist., Zool., 

 X, 1913, 84, PI. XXIV, 1916; upper Chagres, Panama. 



689. Crycon dentex Gunther. 



Yucatan to Ecuador. 



Brycon dentex Gunther, Proc. Zool. Soc. Lond., 1860, 240, Esmeraldas, 

 Ecuador. 



690. Brycon argenteus Meek and Hildebrand. 



Rio Charrera, and in Rio Bayano and Rio Tuyra basins, Pacific slope 



of Panama. 

 Brycon argenleus Meek and Hildebrand, Field Mus. Nat. Hist., Zool., 



X, 1913, 84, PL XXV, 298, 1916; Rio Aruza, Aruza, Panama. 



