1S94.] "^^ [Cope. 



the dorsal region and one on the nape. Five obscure dusky spots on the 

 lateral border of the head to the opercular fissure. Dorsal fin with a dark 

 spot near the extremity. Caudal with a dark spot at each apex and two 

 at the base. Anal, ventrals and pectorals dusky at the extremity. 



Total length, 78 mm. ; length to base of caudal fin, 66 mm. ; length 

 to base of anal fin, 31 mm. ; length to base of ventral, 21 mm. ; length 

 to base of pectoral, U mm. ; length to end of occipital plate, 15 mm. 



Tlie only species which it is necessary to compare with this one is the 

 Loricaria kotiopickyi of Steindachner.* According to this author this 

 species resembles the L. cadece in most essential respects. It has, how- 

 ever, two lines of keels between the dorsal spine and the lateral ridge, 

 where none exist in the L. cadem, and the middle rows of abdominal 

 scales are in five rows instead of three. The teeth are nine or ten instead 

 of six or seven, and the keels of the lateral scales come together on the 

 fifteenth instead of the eighteenth row. The muzzle enters the head 

 length 2.5 times instead of twice. The L. konopickyi is from the Amazon 

 basin. 



Loricaria lima Kner, to which this species is referred as identical by 

 Von Jhring, differs as follows: The head enters the length 4.66 times; 

 the superior ray of the caudal fin is produced ; the eye enters the heaQ 7.5 

 times ; the fins are spotted. 



Loricaria spixii Steindachner, Denkschr. Wien Akad. Wiss., 1881, 18 ; 

 PI. ii. Several specimens. 



HisONOTus L.fflviOR sp. nov. 



Form rather slender, the depth at the base of the first dorsal ray enter- 

 ing the length to base of tail, six times ; and equaling the length of the 

 muzzle anterior to the orbit. Eye small, entering length of head five 

 times, and three and a half times in the nearly flat interorbital space. 

 Venter not entirely covered with scales, there being a series on each side, 

 and a row of smaller ones in the middle, separated from them by a naked 

 space. Median series expanding into a shield just posterior to bases of 

 ventral fins. Dorsal and ventral aspects of caudal region rounded. 

 Scales posteriorly moderately hispid, smoother anteriorly ; on the top of 

 the head the prickles very small. Lower lip convex, with narrow mar- 

 gin, and coarsely tubercular surface. 



Origin of dorsal fin a little posterior to line of origin of ventrals. Caudal 

 fin with the inferior angle produced a little farther than the superior. Spines 

 of fins only moderately hispid, except towards the extremities of the pec- 

 torals, where the prickles are coarser, lladii, D. L 7 ; P. L 7 ; V. I. 5 ; 

 A. L 5. Scales of lateral line, twenty-eight. The pectoral fins reach 

 the middle of the length of the ventrals, but the latter do not reach the 

 anal. 



* Dcnkschriflen math. Wiss. Klass. Kais. Akademied. Wissensch., 1879, p. 45, PI. vi, Fig. 3, 

 aud PI. vii, Fig. 1. 



