28 ME. G. A. BOULENGBE ON FISHES 



24. Euanemus nigeipinnis. (Plate IV. fig. 2.) 

 Euanemus nigripinnis, Boulenger, P. Z. S. 1895, p. 524. 



Depth of body equal to length of head, k\ to 5 times in total length ; width of head 

 equal to length without snout ; groove extending from end of snout to occipital bone ; 

 eye as long as snout, 3| times iti length of head, half interorbital width ; maxillary 

 barbel extending nearly to end of pectoral spine, mandibular barbels to a little beyond 

 base of pectoral spine. Humeral process covered with skin, | length of pectoral 

 spine. Dorsal I 6 ; spine serrated behind, as long as head. Pectoral spine a little 

 shorter than head. Ventral as long as pectoral, reaching a little beyond origin of 

 anal. Anal 36-37. Caudal deeply notched. Upper surface of head, back, and a 

 lateral stripe dark grey, rest white ; pectorals and ventrals deep black, white at the 

 base ; caudal black at the base. 



Total length 190 millim. 



Four specimens from Paraguay. 



25. AUCHENIPTEEUS GALEATUS, L. 



Matto Grosso. 



26. Teachelyopteeus coeiaceus, C. & V. 

 Descalvados, Matto Grosso. 



27. Doeas costatus, L. 

 Descalvados, Matto Grosso. 



28. Doeas maculatus, Val. 

 Paraguay. 



29. Doeas weddelii, Cast. 

 Paraguay. 



30. OxYDOEAS EIGENMANNI. (Plate IV. fig. 3.) 

 Oxydoras cigenmanni, Boulenger, P. Z. S. 1895, p. -524. 



Both jaws with small teeth. Depth of body equal to length of head, 4 times in 

 total length. Posterior nostril nearer the eye than to the anterior nostril. Diameter 

 of eye 4 times in length of head, 1\ in interorbital width, If in length of snout; 

 bases of the six barbels united by the fold of the lower jaw ; maxillary barbels 

 branched, extending a little beyond base of pectoral spine, twice as long as man- 

 dibulars. Gill-cleft extending to below posterior border of eye. Humeral process 



