1913.] NATURAL SCIENCES OF PHILADELPHIA. 571 



Length 56 mm. 



Type, No. 39,308, A. N. S. P. Tributary of the Madeira River 

 near Porto Velho, Brazil. January-February, 1913. Edgar A. 

 Smith. 



Only the type known. It differs from Charax sardina in the entire 

 lower preopercular edge and presence of a humeral and caudal dark 

 spot. 



(Named for Dr. Emilio A. Goeldi, Director of the Museo Paraense 

 and author of numerous works on the natural history of Brazil.) 



LORIOARIIDiB. 

 PLECOSTOMIX.E. 

 Plecostomus madeirae sp. nov. Fig. 23. 



Head, measured to hind edge of occipital process, 3f ; depth 5|; 

 D. I, 7; A. I, 4; P. i, 6; V. i, 5; lateral scutes from pectoral axilla 

 28 to caudal base and 2 more on latter; 5 scutes between dorsal 

 base and that of anal; 3 predorsal scutes; head width equals its 

 length, when measured from occipital process medianly behind; 

 head depth at occiput If; snout If; eye 5|; mouth width 4f; 

 mandibular ramus 6; interorbital 2f ; dorsal spine 1^; anal spine 

 2j; adipose fin 2f; lower caudal lobe 1; pectoral spine 1; ventral 

 spine If. 



Body elongate, well depressed, deepest at dorsal origin and tapering 

 back to moderate, compressed caudal peduncle, which has least 

 depth about equal to its length. 



Head large, well depressed, lower surface flattened with sides 

 sloping up for about ^ greatest width of head, leaving wide and 

 slightly convex occipital region. Snout broad, slopes down evenly 

 and slightly convex all around, and its length f its width opposite 

 front edges of eyes. Eye slightly ellipsoid, well elevated, centre 

 falling about * in head length as measured to occipital process. 

 Pupil small, vertically ellipsoid. Mouth moderately wide, anterior 

 below. Buccal disk deeply ellipsoid, its transverse diameter about 

 equals snout length, its posterior edge finely and rather evenly 

 notched its entire extent, and its front edge with a row of fleshy 

 papillae. Inside of jaws and surface of lower lip outside with large 

 and rather conspicuous papilla?, on latter those median best developed- 

 Upper jaw with one large median conspicuous fleshy papilla inside 

 teeth. Teeth slender, uniserial, long, bent over at ends, bifid, 20 

 in upper jaw and 30 in lower, one of bifurcations always shorter and 

 smaller than other. Inner buccal folds broad. Tongue fleshy, 



