146 THE AMERICAN CHARACIDAE. 
6. HEMIGRAMMUS MARGINATUS Ellis. 
Plate 20, fig. 1. 
Hemigrammus marginatus Evuis, Ann. Carnegie mus., 1911, 8, p. 159, pl. 3, fig. 3 (Queimadas). 
Hasitat.— Head waters of Parana, Paraguay, Guaporé, Itapicurti, and 
San Francisco Rivers. 
Specimens examined. 
Number of Length 
Catalogue number specimens in mm. Locality Collector 
3053 C. Type 1 38 Rio Itapicuri, Queimadas Haseman 
3054 C. Paratypes 22 13-39 Rio Itapicuri, Queimadas Haseman 
3055 C. Paratypes 3 23-29 Boqueirao near mouth of Rio Haseman 
Preto 
3056 C. Paratypes q 28-30 Santa Rita, Rio Preto Haseman 
3057 C. Paratypes 3 29-33 Lagoa da Porto, near Barra, Haseman 
Rio San Francisco 
3058 C. Paratypes 6 26-38 Jacobina, Rio Jacobina, Ita- Haseman 
picurti Basin 
3059 C. Paratypes 18 33-38 Pirapora, Rio San Francisco Haseman 
3060 C. Paratypes 42 18-42 Lagoa Pereira, Barra Haseman 
3061 C. Paratypes 5 37-42 Jaguara, Rio Grande Haseman 
3062 C. Paratypes 5 32-39 Rio Paiaia, Itapicurfti Basin Haseman 
3063 C. Paratypes 8 32-38 Barreiras, Lagoas of Rio Haseman 
Grande, San Francisco Basin 
3064 C. Paratypes 6 22-38 Sete Lagoas, Rio das Velhas Haseman 
3065 C. Paratypes 3 29-35 Tinho, Rio Itapicurii Haseman 
3082 C. Paratypes 1 40 Maciél, Rio Guaporé Haseman 
3084 C. Paratypes 1 28 Mogy Mirim, a creek in Sao Haseman 
Paulo, Parana Basin 
C. Paratype 2 40-42 Rio Zinga, Itapicuri Basin Haseman 
3066 C. Paratypes 9 26-32 Riberao, Azul Lagoa 12 miles Haseman 
from Tieté 
3067 C. Paratype 1 21 Sapucay, Paraguay Haseman 
3077 C. Paratype 1 40 Caceres, Paraguay Haseman 
3083 C. Paratype 1 34 Rio Itapicurt, fazenda de Haseman 
Amaratu, 6 miles north of 
Bom Fin 
Head 3.6 to 3.8; depth 2.8 to 3.25; D.11; A. 20 to 24; scales 5-29 to 
34-3 to 4. Eye 2 in the head. Interorbital less than the eye, 2.75 in the head. 
Compressed; depth of head at the base of the occipital process 1.5 in the 
greatest depth. Preventral and predorsal regions rounded, without complete 
series of median scales. 
