SOUTH i^MERICAN NEMATOGNATHI. 155 



Lower jaw projecting; teeth fine, the intermaxillarj band 

 abovit 8 times as wide as deep. 



Humeral process extending obliquely upward, strongly 

 granular, its lower margin serrate; reaching a little beyond 

 middle of pectoral spine. 



Distance of dorsal spine from snout 3-3| in the length; 

 dorsal spine slender, If -2 in the head, its inner margin 

 roughened, its anterior margin with a median series of 

 diverging spines and two series of smaller teeth; the first 

 ray higher than the spine. Space between dorsal and 

 adipose fins 2.^ in the length; anterior margin of the adipose 

 fin continuous with the profile of the back. 



Caudal obliquely truncate. 



Anal fin strongly convex behind, higher posteriorly than 

 anteriorly. 



Pectoral spine strongly serrate, the outer teeth much 

 longer than the inner ones, especially near the tip of the 

 spine, the flattened sides strongly granular, the granules 

 enlarged anteriorly, forming serrae along either side of the 

 long spine -like marginal teeth; the length of the spine 

 5-6 in the length. 



Lateral line somewhat undulati::ig, with conspicuous 

 pores. 



Dark reddish brown, with longitudinal interrupted 

 bands; belly plain, lower side of head thickly dotted with 

 darker; dorsal and anal fins spotted; caudal fin with irregu- 

 lar dark cross bars; inner surface of ventral and pectoral 

 fins more or less dusky. 



Head 4-4J; depth about 3i; D. I, 5; A. 25; V. 6; P. I, 7. 



167. Trachycorystes striatulus (Steindacbuer.) 



Localities: Linhares, Eio Doce; Itabapuana; Campos; Sao Matbeos; 

 Gurupa. 



168. Trachycorystes brevibarbus (Cope.) 



169. Trachycorystes galeatus (Linnseus.) 



Aucheniplerus maculosiis, immaculatus & punctalus Cuv. k, Val. Au- 

 chenipterus iacustris Liitken. 



