eigenmann: pimelodella and typhlobagrus 



239 



lower lobe. In the largest specimens it extends a little beyond the base of the 

 anal. The pectoral spine in the smallest has 9 spines on half of the length, 12 in 

 the next in size, 15 in the next (125 mm.), 24 on the largest on all but the distal 

 fourth of the spine. The lateral band extends from snout to caudal. The back 

 is similar in color to the band, the space between the back and the lateral band 

 being lighter in color. In the most highly developed the upper caudal lobe is 

 2.5 in the length; the distance between snout and dorsal fulcrum 3.4 in the length. 



The size of the pectoral teeth varies greatly with the locality, the maxillary 

 barbel to a less extent. In 6939, 100 mm. long, it extends about to the end of 

 the base of the anal. 



Only one of the twelve specimens recorded by E. & E. from Goyaz (8196 

 M. C. Z.) is still extant. I am in doubt whether we were correct in referring it to 

 P. gracilis. The caudal is broken off near the base so that it cannot be determined 

 whether it possesses one of the most characteristic features of the species, the 

 prolonged upper caudal lobe. The maxillary barbel extends only to near the 

 tip of the ventrals and is therefore much shorter than in typical specimens of 

 P. gracilis. The eye is smaller than in the average given for the twelve specimens 

 by E. & E., otherwise their description holds. The pectoral spines measured 

 from above average slightly longer than the snout and eye. The dorsal spine is 

 slightly less in length than the snout and eye; it is smooth in front and only very 

 slightly roughened behind. The pectoral spine has nineteen thorns, the longest 

 one being one third the width of the spine. 



A large series of similarly preserved specimens are necessary to properly 

 define this and the preceding species, if the two are really different. 



