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INDIANA UNIVERSITY STUDIES 



angle under its anterior angle; lii'emaxillary with 3-5 teeth in the outer 

 series; maxillary with one (sometimes none or two?) tive-iininted tooth: 

 mandihle with four graduated large teeth and 2-5 small ones on the sides. 

 Gill-rakers 11 + 15. 



Dorsal a little nearer caudal than snout, its margin rounded ; caudal 

 lobes short, about equal to length of head ; depth of caudal peduncle less 

 than its length ; anterior rays of anal the longer, the margin very slightly 

 emarginate. its origin on the vertical from or behind the vertical from 

 the base of the last dorsal ray ; ventrals not reaching anal ; pectorals 

 short, rounded, about equal to head less snout and half the eye ; not 

 reaching ventrals by about 3 scales. 



Scales regularly imbricate ; no interpolated rows below the lateral 

 line ; caudal naked, a basal sheath of one row of scales, along the anterior 

 part or the entire anal; a small axillary scale. 



Sides of head and body thickly covered with chromatophores ; a wedge- 

 shaped humeral spot crossing the 3d to 5th scale of the lateral line ; a 

 narrow black (in formaline) band from upper angle of gill opening to 

 end of middle caudal rays. 



Anal tubercles in male scarcely evident. 



Hoplosternum magdalenae sp. nov. 



Calliclitli i/s ( HoijJosfcrniini J tlioracatus {non C. »& Y.) Steindachner, 



Zur Fish — fauna des Cauca und der Fliisse bei Guayaquil, 14. 1880. 

 (Cauca near Caceres.) 



The specimens mentioned by Steindachner are much lighter in color 

 and have the caudal spotted witli dark, the base with a light bar followed 

 in one specimen with an ill-delined darker band. He had three specimens. 

 7 cm. long. This species is quite distinct from tlioracatus and is most 

 nearly like H. pectoralis Boulenger, from the Paraguay basin. 



Tj-pe, 107 mm. Soplaviento. CM. No. 5081. 



Paratypes, 59. Soplaviento. CM. No. 5082 a-j ; I.U.M. No. 12830. 

 Paratypes, 1. Calamar Cienega. CM. No. 5083. 



Head to end of opercle 3-3.5 in the length ; depth 3.5 ; D. I, 8 ; A. I, 6. 

 Plates If. If; eye 6 in head to end of opercle, 4 in interorbital (5 in 

 pectoralis) ; origin of dorsal nearly equidistant from tip of snout and 

 spine of adipose fin (much nearer snout in pectoralis of equal size), six 

 or seven azygous plates in front of the adipose spine : caudal emarginate ; 

 pectorals reaching to third or fourth plate beyond origin of ventrals (to 

 ventrals in pectoralis) ; distance between pectorals considerably less than 

 the length cf the coracoids (espial to or less than lengtli of coracoids 

 in pectoralis) ; coracoids in contact along the median line, with a narrow 

 V-shaped naked area between them posteriorly, very heavy and over- 

 lapping in front in the male. Barbel to middle of pectoral or a little 

 further (to tip of ventrals in pectoralis) . Fontanel oval in young, circular 

 in adult ; occipital not reaching fontanel by two-thirds to one and one-half 

 diameters of the fontanel. 



Slaty blue-black, but little lighter below. 



