ElGENMANN I COLLECTIONS OF FlSHES FROM PARAGUAY. 119 



bb. " Rimae branchioles confluentes, membrana branchiostega cum istbmo haud 

 connexa ; cauda rotunda, barba maxillarisunica, radia caudalia accessoria 



nulla " .' Acanthopoma. f' 



aa. No labial teeth ; teeth in the jaws in a single series. 



/. Teeth pointed, in a single series in the pre-maxillaries only ; mouth sub-in- 

 ferior ; caudal rounded or but slightly emarginate ; a single maxillary 



barbel Vandellia. 



ff. Teeth broad, incisor-like in both jaws ; caudal forked ; two maxillary barbels. 



Pareiodon. 



21. Homodicetus anisitsi Eigenmann and Ward sp. nov. (Plate 

 XXXIV., Figs. 2-3). 



Type No. 10155, one female 43 mm. long; small creek at Villa 

 Rica, Paraguay (466). 



Head 6y 2 ; depth 5^ ; D. 8 ; A. 8. 



Elongate compressed, head much depressed ; head nearly as wide 

 as long ; snout broad, its horizontal outline rounded ; mouth very 

 large, hemicircular in outline, 2-i- in the head ; lower surface of head 

 flat, upper arched, the eyes directed upward, sidewise and forward ; 

 eye equals snout, 3^ in head, about equal to the interorbital ; no free 

 orbital margin ; origin of maxillary barbels below the last quarter of 

 the eye ; outer and longer barbel shorter than eye, inner barbels much 

 shorter, minute but distinct ; a distinct thin, free, lower lip extending 

 for but a short distance from the angle of the mouth ; teeth of upper 

 lip distinctly visible when mouth is closed ; pectorals extending some 

 distance beyond the axillary gland, their length 2^ in distance from 

 their base to ventrals, equal in length to their distance from the tip of 

 the mouth ; origin of dorsal equidistant from tip of caudal and poste- 



6 Lutkenin Videnskabelige Meddelelser for 1891, Kjobenhavn, 1892, describes 

 Acanthopoma as follows : 



Caput depressum parabolicum, cauda subcompressa : maxillae in tentaculum breve 

 continuse ; os inferum, supra seriebus dentium minutorum plurimis ; rimae branchiales 

 confluentes, membrana branchiostega cum isthmo gulari haud connexa ; spinse oper- 

 culars et interoperculares plures ; pinna dorsalis post pinnas ventrales, inter has et 

 pinnam analem posita. 



Acanthopoma annectens. 



Maal : 



Totallaengde 100 mm. 



Hovedets Lsengde 15 " 



Hovedets Brede 15 " 



Legemets st</>rste H</>jde 10.5 " 



Fra Snudespidsen til Rygfinnen 60 " 



Fra Snudespidsen til Gattet 64 " 



