6 (;yMi^OTiDJ<:. 



llliampliichtlivs liueatus, Castcl. I. c. p. 87, pi. 47. fij^-. 1 ; Kuup, Jpod. 

 p. 130, tig. 5. 



The eye is not much, more distant from the end of the snout than 

 from the gill-opeuing. Coloration apparently variable : — 1. Head 

 without markings ; four dark longitudinal sti'ipes on the side (line- 

 atus). 2. Greater part of the head spotted M'ith black ; back with 

 three rows of black spots surrounded by white dots ; lower part of 

 the sides marbled and dotted (paiitherinus). 3. Head and body 

 marbled with brown (marinoratus). 



Araguay. River Ucayale. 



This species is distinguished by its comparatively short snout, the 

 situation of the vent evidently varying as in its congeners. 



/3. Bhachyrh.-VMPHICHTHYS. Siuiut not tuhifoi-m ; vent behind the ei/es ; 

 anal fin conimenciny below the pectorals. 



4. Rhamphiclithys artedii. 



Seba, iii. tab. 32. fig. 2. • ■ ' 



Ilhaniphictliys artedi, Kaup, Apod. p. 128. 



Snout more than one-third of the length of the head. Eye small, 

 nearer to the end of the snout than to the gill-opening. Yellowish 

 brown, marked witii darker ; fins without markings. Anal fin com- 

 mencing under the extremity of the pectoral ; vent below the pos- 

 terior third of the head. A. 220-223. (Kaup.) 



llivcr Mona (French Guiana). 



5. Rhamphichthys mulleri. 



Kaup, Apod. p. 129. 



Snout more than one-third of the length of the head. Eye of 

 moderate size, nearer to the end of the snout than to the gill-open- 

 ing. Upperside of the head and back uniform black ; lower 2:)art 

 of the sides of head and body with numerous spots ; fins black, with 

 brown rays. Anal fin commencing below the extremity of the pec- 

 toral ; vent below the posterior half of the head. A. 220. {Kaup.) 



French Guiana. 



0. Rhamphichthys brevircstris. 



Stehulachner, Sitze/.iber. Ak. Wiss. Wien, 18G8, hiii. p. 254, taf. 2. 

 fig. 2. 



Snout less than one-third of the length of the head ; eye of mode- 

 rate size. The depth of the body is a little more than the length 

 of the head. Mouth very narrow. Body with numerous irregular, 

 narrow, obli()ue brownish cross bands, (kiieindachner.) 



Kio Guapore. 



