278 MR. G. A. BOULENGER ON FISHES COLLECTED [Mar. 1, 



on the sides of the snout, the nape, and the pectoral fin, differs in 

 the much smaller size of the pectorals, which do not reach the base 

 of the ventrals. I must add that the ventral and dorsal scutes of 

 the three specimens before me agree perfectly with the accurate 

 figure of L. magdalenee, Stdr. (Denkschr. Ak. Wien, xxxix. p. 74, 

 and xli. p. 26, pi. vii. fig. 2). 



14. ACESTRA KNERI, Stdr. 



Acesti-a Tcnerii, Steind. Denkschr. Ak. Wien, xlvi. 1883, p. 26, 

 pi. vii. fig. 1. 



Cauelos and Sarayacu. 



15. BUNOCEPHALUS KNERI, Stdr. 



Bunocephalus hnerii, Steind. I. c. p. 9, pi. ii. fig. 2. 

 Canelos. 



16. Trichomycterus kneri, Stdr. 



Trichomycterus knerii, Steind. Sitzungsb. Ak. Wien, Ixxxvi. i. 

 1882, p. 81, pi. V. fig. 1. 

 Canelos. 



Nannoglanis, g. n. (Trichomycterina). 



Adipose fin present, large. Dorsal fin short, without pungent 

 spine, placed nearly in the middle of the body and behind the 

 ventrals fins ; anal short ; caudal truncated. Teeth viliiform, in 

 broad bands in the jaws ; palate toothless ; cleft of the mouth 

 moderate. No nasal barbel; one maxillary and two lateral mentals. 

 Eyes directed upwards. Head covered with soft skin. No opercular 

 or interopercular armature. Gill-openings wide, continuous across 

 the throat. Ventrals six-rayed. 



17. Nannoglanis fasciatus, sp. n. (Plate XXI. fig. 3.) 



D. 7. A. 8. P. 9. V. 6. 



The length of the head is one fifth of the total, the height of the 

 body one ninth. The diameter of the eye is one third of the length 

 of the snout and three fourths of the width of the interorbital space. 

 The maxillary barbel extends to the middle of the pectoral, the outer 

 mandibular not quite so far. The origin of the dorsal is in the 

 middle between the end of the snout and the extremity of the adi- 

 pose fin, which is as long as the head. Pectorals not quite reaching 

 the base of the ventrals. Vent situated below the origin of the 

 dorsal fin. Yellowish, with four broad brown, black-edged cross 

 bands above ; the first is the broadest, and occupies the space 

 between pectorals and ventrals ; the third is below the adipose fin ; 

 and the fourth, narrowest, at the base of the caudal ; a dark brown 

 line from the eye to the maxillary barbel. 



Total length 52 millim. 



Two specimens, without particular locality. 



