1903.] NATURAL SCIENCES OF PHILADELPHIA. 511 



This variety differs from bahiensis in the number of its scales. Depth 

 in the type 2f , scales 38; in the co-type 2i, scales 39. 



44. Curimatus bimaculatus Steindachner. Blanquillo. 



This species, heretofore known from the Amazonas, is represented 

 by typical specimens from Estancia La Armonia (18 in part); Arroyo 

 Trementina (189); Rio Paraguay at Asuncion (65, 140,170). Speci- 

 mens preserved in formalin have a broad, dark lateral band and a con- 

 spicuous dark spot in front of the dorsal. 



45. Curimatus gilberti Quoy and Gaimard. 



Two specimens from Estancia la Armonia. 



46. Anodus latior (Spix). Blanquillo. 



Three specimens (35 and 97), from Rio Paraguay at Asuncion and 

 Fuerte Olympo. 



47. ProcMlodus scrofa Steind. Zabalo; Carimbata. 



Six specimens, Asuncion, Rio Paraguay (Nos. 40, 81, 174); Estancia 

 La Armonia (19); Arroyo Trementina (205); one specimen received 

 from Dr. von Ihering from Piricicaba. 



48. Hemiodus orthonops sp nov. 



Type No. 9,955 (202), Arroyo Trementina, 150 mm. 



Co-types Nos. 9,956-9,960 (171, 50, 4, 77), five specimens, 170-225 

 mm. Laguna of Rio Paraguay at Asuncion. 



A slender, small-scaled species. Dorsal profile from tip of snout to 

 origin of dorsal slightly but evenly arched. Ventral profile from tip 

 of snout to insertion of ventrals of a like even curvature. Dorsal pro- 

 file from origin of dorsal to caudal peduncle nearly straight. Ventral 

 profile from insertion of ventral to origin of anal slightly convex, rising 

 abruptly from origin of anal to caudal peduncle. Depth of caudal 

 peduncle 2| in head. 



Head subconical, flattened above and on the sides. The lower side 

 of the mandible flattened. Mouth in the ventral profile. The rami 

 of the mandible approaching each other posteriorly. Maxillary short, 

 partly sheathed under the broad preorbital. Mandiljle toothless. 

 Premaxillary with a single series of about 24 movable, short, flat, ser- 

 rated teeth. 



Eye large, 3^ in head, 1 in snout, covered, with the exception of a 

 short slit over the pupil, by broad adipose lids. 



Suborbitals covering cheek, with exception of a narrow space just 

 above the horizontal branch of the preopercle. Branchiostegal rays 4, 

 flat and overlapping each other. Opercle semicircular. Subopercle 



