196 MEMOIRS OF THE CARNEGIE MUSEUM 



sharply so in front of the eye; snout pointed; fontanel continued as a groove to the 

 tip of the dorsal plate; a small foramen on either side of the juncture between the 

 dorsal plate and occipital process; mouth 2 in the distance between the gill-open- 

 ings; five to seven teeth in each ramus of the lower jaw, grouped in front so as to 

 form one continuous patch ; maxillary barbel reaching at least to base of pectoral ; 

 humeral process more than three times as long as wide, rounded behind. 



Lateral plates deepest above end of anal, their depth four-tenths of the length 

 of the eye. 



Distance of origin of dorsal from tip of snout 2.7 in the length. 



Dorsal and pectoral spines about equal in length and equal to the length of the 

 head. 



Belly white; sides of head and body thickly dotted, darkest on dorsal surface of 

 caudal peduncle; a light stripe along the lateral plates and middle caudal rays; 

 bases of the caudal fulcra and a band above and below the central light band black; 

 tip of upper lobe dusky; a dark area on base of dorsal, highest on the spine. 



66. Hemidoras notospilus sp. nov. (Plate XIX, fig. 2.) 



Hemidoras notospilus Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 



1910, 394 (name only). 



Type unique, 70 mm. Crab Falls. (Carnegie Museum Catalog of Fishes 

 No. 1623.) 



Head 3.33; depth 5; D. 1,6; A. 12; lateral plates 33; eye 3 in head, 1.5 in snout; 

 interorbital a little more than half the eye. 



Profile from dorsal to above front of eye nearly straight, descending rapidly in 

 front of eye; snout pointed, lower jaw much the shorter; fontanel continued as a 

 groove to the occipital, not to the tip of the process or the dorsal plate; dorsal plate 

 bat-shaped, a large foramen on either side of it in front; interorbital and snout 

 narrow; depth of head greater than its width, 1.5 in its length. Eye oval, 1.75 

 times as long as high. 



Maxillary barbel reaching pectoral, having numerous small barblets; mental 

 barbels papillose. Distance of dorsal spine from tip of snout 2.5 in the length. 



Dorsal spine a little longer than snout and half the eye. Pectoral spine a 

 little longer than the dorsal spine, reaching the ventrals. Base of adipose less than 

 the length of the eye. 



Lateral shields highest above end of anal, their height 1.33 of the length of 

 the eye. Humeral process more than three times as long as broad. 



Belly white, sides with an increasing amount of pigment toward the back; 



