330 MEMOIRS OF THE CARNEGIE MUSEUM. 



Habitat. — Santa Cathcrina, Brazil. 



Valencienncs's description of the only specimen known, 140 mm. long, is very 

 brief, and I am afraid that it is in part misleading. 



"D. 11; A. 10; P. 9; barbels short, scarcely reaching beyond the eyes; caudal 

 peduncle short and deep; caudal small, truncate, 'le premiere rayon de la dorsal 

 alonge en fil.' 



"Back uniform blackish, lower parts light." 



50. Pygidium iheringi Eigenmann. (Plate L, fig. 5.) 

 Pygidium iheringi Eigenmann, Proc. Am. Philos. Hoc, LVI, Jan., 1918, p. 697. 

 Trichomyctenis punctulatus {non Cuvier & Valenciennes) Ribeiro, Arkiv. for 



Zoologie, IV, No. 19, 1908 (Iporanga). 

 Trichomycterus dispar {non Tschudy) Ribeiro, Kosmos, V, 1908, and Fauna Brasi- 



liense, IV (A), 1912, p. 222 (Rio Iporanga, Sao Paulo). 



Habitat. — Sao Paulo in coastal streams and the Parana basin. 

 7071, C. M., two, 151-160 mm. Sapina, Sao Paulo. July 3, 1908. Haseman. 

 10785, I. U. M., four, 140-161 mm. Santos. Von Ihering, the largest the type. 



Allied to P. punctatissifnvm. from the Aragiiay. 



Head 4.5-5 in the length; D. 11.5 or 12.5; A. 7.5 or 8.5 counting the two rudi- 

 mentary rays in each case ; P. 8 ; width of head equal to its length behind the nasal 

 barbel; eye in middle of the head, interorbital 3.5-4 in the length of the head. 

 Teeth incisors with slightly expanded tips, in bands of four or five series. 



Nasal barbels reaching about to middle of eye, axillary barbel to above middle 

 of opcrcle; pectoral rounded, very little longer than snout and eye, the first ray not 

 prolonged or with only a trace of a projection; distance between origin of ventrals 

 and eye a little greater or less than that between origins of ventrals and middle 

 caudal rays; the ventrals as long as the snout, not nearlj' reaching vent, nearly 

 halfway to the anal; origin of anal on, or behind, the vertical from the base of the 

 last dorsal ray; distance between bases of last anal ray and middle caudal rays five 

 or a little over five in the length; caudal slightly rounded, seven to seven and a 

 half in the length; dorsal low and long, the distance between its origin and the base 

 of the middle caudal ray about one and a third in its distance from the snout, its 

 first ray over posterior half of the ventrals. 



Sides and back with numerous s]iots, smallest over pectorals, largest over 

 dorsal, rarely coalescent. 



51. Pygidium zonatum sp. nov. (Plate LI, fig. 1.) 

 7596, C. M., a, the type, 62 mm., /; and c, paratypes, 50 and 55 mm. Agua Quente. 

 Nov. 27. 1908. Haseman. 



