78 



Annals of the Carnegie Museum. 



its base to the dorsal; skull slightly rounded, narrowed forward; frontal 

 fontanel extending to above the anterior margin of the pupil, narrower 

 ^--•v.^ than the parietal, but of about equal length; 



mouth very oblique, narrow, a distinct angle be- 

 tween the premaxillary and the maxillary, the 

 upper anterior margin of which is rounded; lower 

 jaw with about ten conical teeth, the first small, 

 the next two larger and equal, the third very 

 long, the middle one of the remainder largest; 

 a pair of small conical teeth behind the first pair 

 of the front series; premaxillary with three con- 

 ical teeth in an outer series and four long conical 

 teeth graduated from the large first one, a min- 

 ute notch on one or both sides of these teeth 

 near their tip; maxillary with about twenty con- 

 ical teeth, smallest and close-set near the pre- 

 maxillary ; second suborbital leaving a wide 

 naked margin; gill-rakers 7 + 13, the lower limb 

 of the arch long; adipose lid leaving only the 

 pupil free. 



Lateral line complete, sharply decurved on its 

 first four scales and then running straight to the middle of the lower 

 caudal lobe; fins naked; axillary scales large; a large flap just above 

 the pectoral more than half the length of the head. 



Dorsal very small, its origin equidistant from base of middle caudal 

 rays and head or nearer the former; adipose fin small; anal low, its 

 origin under the origin of the dorsal; ventrals very small, almost half 

 as long as the head; pectorals large, longer than head. 



A dusky stripe from upper angle of opercle to the middle of the 

 caudal. 



Fig. I. Mouth oiA. 

 anchovia Eig. (greatly 

 enlarged). 



2. Corydoras metae Eigenmann. (Plate XIV, Fig. i.) 

 Only the type of this species is known. The description in the 

 Indiana University Studies, No. 23, 1914, p. 230, is supplemented by 

 the figure cited above. 



3. Otocinclus spectabilis Eigenmann. (Plate XIV, Figs. 2 and 3.) 

 Ten specimens of this species were collected by Gonzales at Villa- 

 vicencio. The description in Indiana University Studies, No. 23, 



