Jordati and FA<ennaHii. — Fishes of North America. 157 



a. Suout long and narrow, its lower surface granular. 

 Uemiodon, (lifiJ, half; oJous, tooth): 

 6. Slaigiii of head in both sexes granular. Teeth minuto or wanting. Lateral keels 

 becoming parallel, not coalescing. No keels on head or scutes before dorsal. 



c. Teeth minute, numerous in both jaws. Lower surface of head partly naked; up- 



per and lower caudal rays greatly produced. Scales 33. panamensis, 251. 



Sturisoma, (s/iirio, sturgeon; (Toifto, body): 



hh. Margin of head in males with numerous bristles. Teeth well developed in both jaws; 

 lateral keels coalescing. 



d. Belly with 5 series of plates. Outer caudal rays produced. Scales 34. 



U0STnATA,252. 

 <m. Suout acute or rounded, not produced. 



KiNELORiCABiA, ('piV ij, rasp; Loricaria): 

 e. Margin of the head in males with ntimerous bristles. Teeth well developed. Uppercau- 

 dal ray greatly produced. Lips not greatlj' expanded and without long cirri. 

 /. Orbit notched; head naked below. 



(/. Anal plato rather large, with 3 smaller plates before it; lower lip2-lobed; 



nuchal plates each with 2 strong keels; mucous pores of anterior part of 



body black; all the fins spotted. lima, 253. 



g<j. Anal region with small scales like those on belly; nuchal ridges very low; 



fin rays spotted. bransfoudi, 234. 



ee. JIargin of the head in both sexes granular or hispid. 



h. I'lates between Tentrals large; more or less connected to form a buckler. 

 Pabahemiodon, {napd, near; Hetniodon): 



i. Head longer than broad. Belly v.'ith 3 or more longitudinal series of plates. 

 j. Uppermost caudal ray spinous; lower lobe emarginate with short cirri. 

 Each jaw with S vt 10 teeth; no keel on caudal or nuchal plates. 



uracantha, 255. 

 Loricaria: 

 hh. Plates between ventrals, if present, small; no large anal i)late. 



it. Belly partly naked, the middle lino and sides armed; lower lip with numerous 

 cirri and marginal fringes; teeth few, small; an occipital keel; upper 

 surface with light and dark lines ; (vU fins, except anal, spotted with violet. 



VABIEGATA,256. 



Subgenus HEMIODON, Kner. 

 251. LORICARIA PANAMENSIS, Eigenmann & Eigonmann. 



Head 4^. D. 8; A. G; V. I, 5. Scales 33. Lower surface of head partly 

 naked ; no keels on the head or nape ; a large naked area about the mouth. 

 Orbit without notch, 4 in snout ; anterior profile concave. Belly with 5 

 series of plates. Upjier caudal filament about as long as body ; first dor- 

 sal ray very high. Brownish, a blackish area in front of eye; dorsal 

 somewhat 8[)otted ; a stripe on each lobe of caudal. Panama. (Eigen- 

 mann). 



Loricaria pnnantensis, Eigenmann, S. A. Nematoguathi, 3G5, 1890, Panama. 



Subgenus STURISOMA, Swainson. 



232. LORICARIA ROSTRATA, Spix. 

 Head 4^. D. 8; A. 6. Scales 34. Body little depressed anteriorly; 

 head without keels or ridges ; its surfaces and plates evenly hispid ; nuchal 

 plates weakly bicarinate. Orbit without notch, 4J in snout, 7i in head. 

 Anterior profile very concave; the snout long and narrow; upper lip 

 granular; lower Up entire and rounded, elongate, papillose; free part of 



