EIGENMANN: THE PYGIDIID.E, A FAMILY OF SOUTH AMERICAN CATFISHES. 293 



Papers Cal. Acad. Sci., I, 1890, p. 326; Boulenger, Boll. Mus. Zool. Anat. 

 Comp. Univ. Torino, XII, 1897 (Taiza). 



Fig. 7. Pygidium tenue (Weyenbergh). After Weyenbergh. 



Pygidium corduvense Eigenmann & Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 

 p. 36; Eigenmann, Reports Princeton Univ. Exped. Patagonia, III, 1910, 

 p. 399. 



Fig. 8. Pygidium corduvense (Weyenbergh). After Weyenbergh. 



