52. SCIADES. 113 



2. Piratinga reticulata. 



Bagrtts reticulatus, Kner, Sitzungsber. Wien. Acad. xxvi. p. 376. 

 B. 12. D. 1/6. A. 12. P. 1/9. 



The length of the head is nearly one-fourth of the total (with the 

 caudal) ; it is much broader than high, its greatest width being 

 three-fourths of its length ; the upper jaw is the longer. The teeth 

 on the palate form an arched band. Barbels six : those of the max- 

 illaries extend beyond the base of the ventrals, the outer ones of the 

 mandible to the root of the pectorals. Eye nearer to the prseopercular 

 limb than to the end of the snout. Dorsal fin as high as the body 

 below ; its spine terminates in a compressed filament, and is smooth 

 anteriorly, and serrated posteriorly towards its point. Pectoral spine 

 strong, striated, and serrated. Adipose fin longer than anal. {Kner.) 



Salto Theotonio on the river Araguay, Forte do Rio Branco, Bio 

 Madeira. 



3. Piratinga goliath. 



Bagrus goliath (Heck.), Kner, I. c. p. 379. 



B. 12. D. 1/6. A. 11-12. 



The length of the head is two-sevenths of the total (with the 

 caudal) ; it is broader than high, and two-thirds as broad as long. 

 Jaws equal in length anteriorly. The transverse band of vomer- 

 ine teeth is broader than, and continuous with, the palatine band. 

 Barbels six : those of the maxillaries extend on to the opercle, the 

 outer ones of the mandible to the root of the pectoral. The eyes 

 occupy the middle of the length of the head. Dorsal fin lower than 

 the body below ; its spine terminates in a compressed filament, and 

 is smooth anteriorly, and serrated posteriorly towards its point. 

 Pectoral spine strong, serrated interiorly. Adipose fin but little 

 longer than anal. (Kner.) 



Salto Theotonio (Brazil). 



52. SCIADES. 



Sciades, sp., Mull, 8f Trosch. Hor. Ichth. p. 6. 



Leiarius et Sciadeichthys, Bleek. Nederl. Tydschr. Dierk. 1863, p. 99. 



Adipose fin rather long ; dorsal fin with a pungent spine and with 

 ten or eleven soft rays ; anal fin short. Barbels six. Teeth on the 

 palate villiform. The upper jaw is the longer. Eves with a free 

 orbital margin. Caudal forked ; ventral rays six 



Brazil. 



1. Sciades pictus. 

 Mull. Sf Trosch. Hor. Ichth. iii. p. 8. tab. 1. fig. 1 ; Kner, Sitzungsber. 

 Wien. Acad. xxvi. p. 386. 



B. 9. D. 1/10. A. 10. P. 1/11. 

 Vomerine teeth in a narrow transverse band ; an ovate patch of 

 villiform teeth posteriorly on each side of the palate. Barbels very 

 long. Dorsal fin elevated, with the spine slender and longer than 



