﻿Cl.V. Heptaptergii. 457 



P. 15, V. 6. A. 17. C. 20. D. 63. 



Habitat Nilum. 

 Hinc maiiifestnm iit caracteres genericoS 

 reliqnos Linnaeanos, veluti dentes phtres emar- 

 ginatos, defectum operculi br membranae br. ra- 

 dium unum minime de toto genere valere. 



GEN. 98. POLYODON. 



Roftrum fere fpatulaeforme , fere longitudine 

 corporis, os dentatum. 



1. Foi-ium. tab. 62. /. 1. V. Pofyodon 

 feuiUe Lacepede /.4.02. t. 12. f. 3. 



Corpus oblongum, cartilagineum, nudum, 

 roftrum horizontale, utrinque in lateribus mem- 

 brana crafla, venulofa auctum, os inferum ric- 

 tus rotundus dentium gemina feries mucrona- 

 torum crafforum et recurvorum in maxilla 

 fuperiore, unica feries in inferiore, in palato 

 cartilagines dentatae adfunt, nares geminae 

 utrinque ante oculos, opercula longa pofterius 

 acuminata, inferius cutacea, guttata membrana 

 branchiostega nulla, apertura branchialis late- 

 ralis ampla, branchiae 5, quarum quinta po- 

 itrema tota operculo adnata, quarta partim li- 

 bera, pinnae pectorales et ventrales parvae, 

 dorfalis, fupra bafin ventralium, parum per fal- 

 cata, caudalis furcata, linea lateralis recta, ve- 

 iica pneumatica fimplex- 



Hofpitatur in Mufeo horti botanici Pari- 

 fiis, longus 10-11 pollices. 



Hunc eundem pifcem breviter memoravit 

 Bonnaterrep. 13. fed ante utrumque Gallnm 

 multo tempore civis eorum Manduit in|Rozier 

 Obfervations fnf la phylique anni 1774. t. IV. 

 p. 582. allatum ex Louiliana Americana (cu- 



