98 bulletin: museum of compakative zoology. 



and more rarely, the tips of the pectorals, also dusky ; middle caudal rays dark ; 

 tips of first 2 rays of anal milk-white. 



Many specimens, 36-138 mm. Rio Parahyba, Mendez, Muriahe, and Taubete\ 



Astyanax seabripinnis intermedius, subsp. nov. 



The true A. seabripinnis shades into the A. taeniatus Jenyns in these speci- 

 mens. We have the elongate form, depth (about 3) of A. seabripinnis ; the eye 

 is larger, being about 2.5-2.75, rarely 3, in the head; head slender, pointed. 

 A. 21 to 21 in the Parahyba specimens, 23 to 26 in the Santa Clara specimens ; 

 scales 37 to 39 from the Parahyba, lost from the Santa Clara specimens. 



Many specimens, 38-113 mm. long. Rio Parahyba and Santa Clara. 



Astyanax multidens, sp. nov. 



One of the smallest species of the genus. Distinguished from its relatives 

 gracilior and paucidens by the large number (5) of maxillary teeth, and the large 

 second suborbital. 



Head about 3.75; depth 3.33-3.25; D. 11; A. 24-26; scales 5 or 6-32 to 

 34-4; eye about 2.5 in head; interorbital about 3. 



Straw colored in alcohol ; a vertical, humeral spot above third and fourth scales 

 of the lateral line ; a narrow, silvery band, overlying a black line ; caudal with 

 the distal part of its middle rays dark, the black of the caudal separated by an 

 interspace from the black line of the sides; tip of highest dorsal and anal rays 

 sometimes milk-white ; fins otherwise without markings. 



Many specimens, 27 (to base of C)-32 mm. (to base of C). Obidos, and 

 Silva, Lake Saraca. 



Astyanax gracilior, sp. nov. 



Closely related to multidens. The caudal spot is much more prominent, ex- 

 tending to the base of the rays; humeral spot very faint; depth 3.5-4; maxillary 

 teeth three, about 5 -pointed; five large deiitary teeth; three teeth in outer row 

 of premaxillary in two of the specimens, five in one ; pectorals not reaching ven- 

 trals. A. 22-24 ; lateral line 36-37. 



Three specimens, 35-63 mm. long. Obidos and Villa Bella. 



Deuterodon pedri, sp. nov. 



Head 4-4.33; depth about 3; D. 10 or 11 ; A. 22-27- 



A little more slender than D. iguape. Second suborbital leaving a wide naked 

 area ; maxillary with 2 or 3 teeth. 



A humeral spot, a silvery lateral band, and a large caudal spot continued, 

 apparently, to end of middle rays. 



