ANNOTATED LIST OF THE SPECIES 235 
284. KNopUS MEGALOPS Myers 
Knodus megalops Myers, in Eigenmann and Myers, 1929, Mem. Mus. Comp. Zool., XLIII, v, 
suppl., 527. 
Rio Pichis, Oriental Peru 
17668, 1, type, 59 mm., Puerto Bermudez, Rio Pichis, Allen, July, 1920. 
Genus 107: BARIO Myers 
Tetragonopterus (in part) Cuvier, 1817, Régne Anim., II, 166, argenteus. 
Entomolepis Eigenmann, 1917, Mem. Mus. Comp. Zool., XLIII, i, 63, preoccupied. 
Bario Myers, 1940, Stanford Ichth. Bull., IT, 1, suppl., 35. 
Type: Tetragonopterus steindachneri Kigenmann 
Peruvian and Middle Amazons 
Caudal scaly; lateral line complete and but little curved; scales crenate; one 
scale enlarged on either side of occipital process; maxillary with few teeth; second 
suborbital withdrawn so as to leave a narrow naked area on the cheek. 
Differing from Moenkhausia chiefly in the crenate scales. 
285. BARIO STEINDACHNERI (Eigenmann) 
Tetragonopterus lineatus Steindachner (non Perugia), 1891, Sitzb. Kk. Akad. Wiss. Wien, C, 368 
pl. ui, fig. 1, Iquitos, four, 110 mm. 
Tetragonopterus steindachnert Eigenmann, 1893, Proc. U.S. Nat. Mus., XVI, 53. 
Moenkhausia steindachnert Kigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 437. 
Entomolepis steindachnert Kigenmann, 1917, Mem. Mus. Comp. Zool., XLIII, i, 64, pl. v, fig. 1, 
Peruvian Amazon. 
Bario steindachneri Myers, 1940, Stanford Ichth. Bull., II, 1, 35. 
Middle and Alto Amazonas 
15750, 35, 68-110 mm., brook, Rio Itaya, near Iquitos, Allen, September, 1920. 
Distinguished by the crenulations of the scales, compressed line of the pre- 
ventral, and peculiar coloration. 
A general silvery body color tinged with saffron, becoming brownish above; 
a faint humeral spot above the fourth scale of the lateral line; a series of dark 
longitudinal lines between the series of scales; a large caudal blotch not reaching 
the ends of the middle caudal rays. 
The illustration of the species mentioned above is erroneously labeled (1917, 
Mem. Mus. Comp. Zool., XLIII, i, pl. v). The figure which belongs with Bario 
steindachnert 1s no. 1, and should be so indicated; plate v, fig. 3 should be Moenk- 
hausia jamest. 
Genus 108: TETRAGONOPTERUS Cuvier 
Tetragonopterus Artedi, Seba, 1758, Locupl. Rerum, ITI, pl. xxxiv, fig. 3, argenteus; 
Cuvier, 1817, Régne Anim., II, 166, argenteus; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 438; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 319; 
Eigenmann, 1917, Mem. Mus. Comp. Zool., XLII, i, 54. 
