THE AMERICAN TETRAGONOPTERINAE. 



85 



Moenkhausia with an incomplete lateral line, the other leads towards the condi- 

 tion found in Psellogrammus in which the lateral line is always interrupted but 

 continued to the caudal. 



11. Moenkhausia grandisquamis (Miiller and Troschel). 

 Plate 12, fig. 3; Plate 100, fig. 6. 



Tetragonoplerus grandisquamis Muller & Troschel, Horae ichthyol, 1845, 1, p. 27, tab. 8, fig. 2 (Suri- 

 nam) ; GtJNTHER, Cat. fishes Brit, mus., 1864, 6, p. 324 (British Guiana) ; Eigenmann & Eigen- 

 mann, Proc. U. S. N. M., 1891, 14, p. 53. 



Moenkhausia grandisquamis Eigenmann, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 437; 

 Mem. Carnegie mus., 1912, 6, p. 323; pi. 77, fig. 2. 



Habitat. — Guianas, Amazons. 



Catalogue Number of 

 number specimens 



20694 19 



20811, 20815 7 



20981, 20979 3 



20977 



20875 1 



20988 2 



20707 



20879 (part) 2 



20830, 20879 (part) 4 



20844 6 



20739 3 



20014 2 



20725 14 ' 



3736 C. 6 



1348 C, 118571. 51 



1349 C, 118581. 66 



1350 C, 118591. 35 



1351 C, 118601. 8 



1352 C. 1 



1353 C. 1 

 3000 C. 1 



Specimens examined. 



Length in mm. Locality Collector 



about 64-91 Goyaz Sn. Honario 



40-85 lea James 



70-97 Lago Alexo Thayer 



66 Manacapuru James 



45-52 Serpa Thayer 



47-53 Villa Bella Agassiz 



44-51 Obidos James 



44-53 Obidos James 



16-84 Obidos. Col. Bentos 



60-75 Monte Alegre Agassiz 



74 Justa 



poor Gurupa Agassiz 



48-52 Santarem Haseman 



45-79 Bartica, Essequibo River Shideler 



51-86 Rockstone, Essequibo River Eigenmann 



50-115 Crab Falls, Essequibo River Eigenmann 



64-110 Tumatumari, Lower Potaro Eigenmann 



122 Cangaruma, Lower Potaro Eigenmann 



55 Wismar, Demerara R. Eigenmann 



54 ' Maciel, Rio Guapore Haseman 



This species can very readily be distinguished from all others of the genus 

 by the very widely diverging striae of the scales. The striae are very irregular 



• To base of caudal July 23, 1909. 



