576 PROCEEDINGS OF THE ACADEMY OF [Oc|t.,> 



% 



similar one forks out below eye to opercle. Fins all largely pale. 

 or whitish. Caudal whitish, filaments grayish, and along upper, 

 concurrently blackish streak. Along side of caudal peduncle at 

 junction of each scute small, rounded, whitish spot. 



Length to caudal base 100 mm., to end of caudal filaments 173 mm. 



Type, No. 39,313, A. N. S. P. Madeira River, about 200 miles 

 east of W. Long. 62° 20', Brazil. 1912. Edgar A. Smith. 



Also No. 39,314, A. N. S. P., paratype. Tributary of the Madeira 

 River near Porto Velho, Brazil. January-February, 1913. Edgar 

 A. Smith. This specimen is quite small, though is apparently the 

 young. 



Only the above examples known. The species is related to 

 Farlowella gladuis (Boulenger),^^ Farlowella oxyrhynchus (Kner),^' 

 and Farlowella natter eri Steindachner.^* From the first two it differs 

 in the larger eye and in the shorter pectoral and presence of four 

 scutes between the pectoral origins. 



(Named for Mr. Edgar A. Smith.) 



OIOHLID^. 

 .Equidens madeirae sp. nov. Fig. 25. 



Head 3yV; depth 2§; D. xvi, 9, i; A. in, 8; P. i, 14; V. i, 5; 

 scales 18 in upper branch of 1. 1.; 4 scales between spinous dorsal 

 origin and 1. 1.; 2 scales between rayed dorsal origin and 1. 1.; 6 

 scales obliquely back from anal origin to beginning of lower branch 

 of 1. 1.; 9 predorsal scales; head width 1| in its length; head depth 

 at occiput 1; snout 3yo; eye 3|; maxillary 4|; interorbital 3; 

 mandible 2f ; sixth dorsal spine 2; sixteenth dorsal spine 2\; fifth 

 dorsal ray If; third anal spine 2|; fourth ray If; least depth of 

 caudal peduncle 2|; caudal 1; pectoral lyV; ventral 1|. 



Body rather ovoid in contour, well compressed, back well elevated 

 with upper profile more convex than lower profile, and greatest 

 depth about opposite tip of depressed ventral spine tip. Body edges 

 all rounded convexly, except very obsolete median predorsal keel. 

 Caudal peduncle well compressed, about long as deep. 



Head moderate, well compressed, upper profile more inclined than 

 lower, very slightly concave before eye above, and lower profile 

 little inclined. Sides of head slightly convex, and sloping off in 



^"^ Acestra gladius Boulenger, Trans. Zool. Soc, London, XIV, 1897, p. 425, 

 PI. 41, fig. 2. Rio Jurua. 



^^ Acestra oxyrhynchus Kner, Denk. Ak. Wiss., Wien, VI, 1853, p. 95, PI. 8, 

 fig. 2. 



1* Annul. Naturh. Hofmus., Wien, 1910, p. 403. Middle Amazon (possibly 

 Rio Negro). 



