SOUTH AMERICAN FLSIIES 



37 



(Genera and Species of the Glandueocaitdtn/k with tiikir 

 Distribution) 



i. STEVARDIA Clill. 

 Kvij to l/ic Siiccif's of ^^tcrdrdid 

 a. Last anal ray produced in Ixith male and female: candal in male 

 divided to its base, the lower fnk-ra .se])ar;it(Ml fr«iiii tlic liii. f( imiiiu- ;i spnr 

 the basal scales of the lo\Yer lobe archini; over a coiisidcraltlo civity. 



1. (I I id Id E'iiienmann. 



aa. Last anal ray not ]n'odncod; candal in male not divided, witliont 

 a basal simr and withont nnitcd scales covei'in-- m poncli. 



'2. dihiitiiiiii.s (Jill. 



1. Stevardia aliata. Eigenmann sp. nov. 

 52J5 C. M. Type, a male 75 mm. over all. 



5489 C. M. 18180 I. U. M. Paratypes. 20. largest male 77 mm, Rio Negro. 



Villavicencio. Gonzales. 

 5400 C. M. 13181 I. U. M. Paratypes, 8. largest 51 mm. Pdo Gnndrigna. 



Gonzales. 



Plead to npper angle of gill-oi)ehing 4.5-5 in the length ; depth 8.5 ; D. 

 10; A. 24-28; scales 6-48-0; eye a little longer than snout, a little less 

 than interorbital, about 8 in the head to the base of the opercular process. 



Dorsal outline straight or but little curved ; ventral outline regularly 

 arched from the chin to the end of the base of the anal ; p-reventral area 

 rounded or narroNvly keeled, without distinct median series of scales : 

 predorsal area rounded, with about 20 scales in a median series: occipital 

 process short, about 1/8 in the distance from its base to the dorsal, bor- 

 dered by two scales on each side; frontal fontanel a minute pore, parietal 

 fontanel narrow excejit at the base of the occipital process, where it is 

 rhomboid; cheeks entirely covered by the second suborbital: maxillary 

 premaxillary about half as long as head to upper a.ngle of gill-opening. 



:Mandible with five teeth, the second snniller than the first, rapidly 

 graduate from the third" which is nearly as large as the first; a few 

 minute teeth on the sides; premaxillary with two to four teeth in the outer 

 series and five in the inner; two or three teeth on the maxillary; teeth of 

 the inner series of the premaxillary and of the front part of the mandible 

 with a ver.\' hu'ge median cusp and two minute lateral cusps on each side. 



Opercle in the female pointed, reaching to just above the base of the 

 first I'.'ectoral ray; in the niale jtrolouged in a style with an expanded 

 dermal fiaj) over the middle or })osterior half of the anal ; gill-rakcrs very 

 short. 



A few inter])olated rows of scales from above the middle of the ven- 

 trals, the series deflected towards the anal : scales of the sides continued 

 to form a sheath at the base of the arial : caudal in female naked, the 

 scales at its base normal ; scales of the lower caudal lobe of the male 

 united and bulging over a large cavity between them and the caudal, the 

 pouch open behind; each scale with a number of radials. 



Fins very different in the two sexes; origin of dorsal equidistant from 

 base of middle caudal rays and upper angle of gill-opening in the female, 

 and the eye in the male, its height equal to length of head in female, greatly 



