256 The South American Cat-fishes. 



the eyes loosely conuecled, so that these parts are soft. Interorbital 

 region flat. An obtuse ridge extends from the margin of the interorbital 

 nearly to the snout. A similar ridge extends from the orbit slightly past 

 the nares. Distance between the nares eiiual to length of orbit. Head 

 and snout hispid. Eye 24 in interorbital, 3^ in snout, 5| in the head. 

 Length of head in body about 3. 



Dorsal long, length of base equals six times the distance between the 

 adipose and dorsal. 



Caudal obliquely truncated ; lower lobe produced. 



Pectoral spine strong, reaching nearly to middle of venti'als, covered 

 with short recurved hooks. 



Ventral surface with a patch of granulated scutes opposite the base of 

 each pectoral spine and larger patches posterior to these along the sides ; 

 a few scutes are scattered over the posterior part of the ventral region 

 back of and between the ventrals, also a round patch between the pectoral 

 patches. 



Lower lip with numerous papillae, not notched. Barbels equal ^ of 

 interorbital diameter. 



Preopercle with about 35 hooked spines ; the longest equals about one 

 and a half times the orbital diameter. 



Teeth with tips divided into nearly equal lobes. 



Rays and connecting membrane of dorsal covered with numerous small 

 white spots ; the other fins and the body similarly, but less distinctly 

 spotted. L. 1. 25 ; D. 1-7 ; A. 5 : Y. 6. Length 20 cm. 



Trocera on Tocantins. One specimen. 



22. Cochliodoii coclilioclou Kuer. 1677, 1681, 1686, . Four 



specimens. Ma raj o, Brazil. 



23. Paiiaqiie iiigrolineatufii (Peters). 1691. Brazil. 



24. Pterysopliclithys partialis (Castelnau). 1683,1698. Brazil. 



25. Ancisti'us cirrliosiis diiliius E. & E. One specimen. Brazil. 



26. Aiicistru!^ ieiicosticiis (Gilnther). One specimen. Lower 

 Amazon. 



CALLICHTHIID.E. 



27. Calliclitliys calliclitliys (Linn.). 1667. Trocera on Tocan- 

 tins. (?) 



28. HoplosteMiuni littorale (Hancock). 1731, 1732. Brazil. 



29. Hoplosternuiii tliorocatum (Cuv. & Val.). 1668. Itaituba, 

 Brazil. 



