﻿ARKIV FOR ZOOLOGI. 



BAND 4. N:o 19. 



Oii Fislies from tlie Iporaiig:a Eiver, 

 S. Paiilo-Brasil. 



By 



ALIPIO DE MIRANDA RIBEIRO. 



(Seeretary to the National Museum of Rio de Janeiro.) 



With one Plate. 

 Communicated April 8t'i by Hj. Théel and E. Lönnberg. 



TyphlobagTUS Kronei, nob. 



Kosmos, no. 1, January-1907, with figures. 



Head depressed, 4 to 4 ^i in the total length (without 

 caudal); mouth anterior, the upper jaw sHghtly projecting, 

 hps very thin, adherent, hiatus 2V"> in the head, maxillary 

 barbels sub-terete, in the young reaching to base of ventral, 

 in adult to tip of pectoral fins; post-mental barbels to preoper- 

 cular edge; nares tubulate; fontanel not perceptible exteriorly, 

 very narrow, reaching to the base of the occipital process, 

 a bridge across it, above the posterior edge of the orbit. 

 Occipital process also covered by the skin, reaching to the 

 predorsal plate (and not removed from it, as it was said in 

 the quoted Kosmos). Eve quite absent, two linear slits in- 

 dicate the orbital region; distance between the slits 4 in 

 tliu length between the tip of the snout and the base of the 

 first dorsal ray; gill-openings wide, confluent in the isthmus 

 nåder the orbital slits. Body robust ; depth 4 V:* to 5 in 

 the total length; pectoral fins rounded, the spine moderate, 

 smooth in the anterior and serrated in the posterior edge, from the 

 base to the 2nd. thii'd of its length ; it reaches the vertical of the 



Arl-ir för zoologi. Band 4. N:o IH. 1 



