Z. RHAMPHICnTHYS. O 



a. Rhamphichthys. Snout produced into a tube ; vent below or in advance 

 of the eyes: anal Jin commencing at the throat. 



1. RhampMchthys rostratus. 



Seba, iii. tab. 32. fig. 5 (ii. tab. G9. no. 3 P P). 



Gymnotus, sp., Gronoo. Zoophyl. no. 107 ; Mus. Ichth. no. 73. 



Gymnotus rostratus, L. Syst. Nat. i. p. 428 ; Gronov. Stjst. ed. Gray, 



p. 22. 



longirostratus, Laccp. ii. p. 178. 



Rhamphichthys rostratus (part.), Midi. 4' Trosch. Hw. Ichthyol. iii. 



p. 15; Steindachner, Sitzysb. Ak. Wiss. Wien, 1868, Iviii. p. 256. 

 schoniburgkii, Kaup, Apod. p. 135, fig. 10 ; Steindachner, I. c. 



p. 258. 

 schneideri, Kaup, Apod. p. 136, fig. 11. 



The distance of the centre of the eye from the gill-opening is one- 

 half or nearly one-half of that from the end of the snout. Scales 

 very small, only those near the lateral line (which is naked) being 

 a little larger. Brown ; head, body, and fins with darker, sometimes 

 ocellated spots. 



In full-grown examples (35-37 inches) the vent and urogenital 

 papilla is placed far in advance of the eyes, whilst in younger indi- 

 viduals (24-30 inches) it is below or but slightly in advance of the 

 eyes. 



Guyanas. 



a, b-c. Fine specimens, 30-34 inches long. Surinam. From Hr. 

 Kappler's Collection. 



d. Adult. Surinam. From the Collection of Dr. van Lidth do 



Jeude. 



e. Half-grown. British Guyana. 



2, RhampMchthys bloclui 



Gymnonotus rostratus, £1. Schn. p. 522, tab. 106 (not L.). 

 llhamphiclithys reinliardtii, Kaup, Apod. p. 132, fig. 8. 

 blochii, Kaicp, Ajwd. p. 133, fig. 9. 



The distance of the centre of the eye from the giU- opening is 

 two-thirds of that from the end of the snout. Scales very small, 

 only those near the lateral Une being larger ; head, body, and anal 

 fi.n with irregular brownish-black sj^ots and dots. 



The vent is below the eye in a specimen 19 inches long, some- 

 what before the eye in one of 25 inches, and considerably in advance 

 of it in a third of 29 inches. 



Brazil. 



a. Nineteen inches long. Para, (learned RJi.rostratiishj Dr. Kau]).) 



3. Rhamphichthys pantherinus. 



Rhamphichthys marmoratus, Castcl. Anim. A?uer. Sud, Poiss. p. 86, 



pi. 40. fig. 2 ; Kaup, Apod. p. 132, fig. 7. 

 pantherinus, Cast el. I. c. fig. 3 ; Kaup, Apod. p. 131, fig. 0. 



