8 Synopsis of the Fresh Water Fishes, 



tion to the Scombroid genus Trichiurus than as a member of the 

 same class, and its only resemblance consists in the elongation 

 of the tail into a filament. It has not the most remote resem- 

 blance to the Lamprey, and even belongs to a different sub- 

 class. 



The fishes referred to Pcecilia would have been placed by 

 most naturalists in the genus Hydrargyra of Lacepede. 



Of the Siluroids referred to the genus Mystus, the fresh 

 water species belongs to the genus which we call Pimelenotus ; 

 in conformity with the system adopted, it should have been 

 placed in the catalogue in Pimelodus. The marine fish is a 

 Bagrus, of which genus there is more than one species in the 

 island. 



There are three genera and at least four species of mailed 

 Siluroids belonging to the old genus Callichthys. The true 

 Cascaduras belong to the genus Callichthys as revised by us, 

 and our new genus Hoplosternum ; the " small fish " is nearly 

 allied to Callichthys paleatus of Jenyns, and belongs to the 

 Swainsonian genus Hoplosoma. 



The " Anne Marie," or " Tata," as it appears to be more 

 commonly called, is rightly identified as belonging to the genus 

 Hypostomus. 



The two species of so called Hydrocyon belong to two very 

 distinct genera ; one of them is a species of the genus Tetrago- 

 nopterus as accepted by Valenciennes, and the other is a 

 Curimatus of Yalenciennes, and an Anodus of Spix and Agassiz. 

 The species of both genera are very abundant. 



Of the two species referred to Erythrinus, one only belongs to 

 that genus as revised by Miiller and Troschel, and now accepted 

 by ichthyologists ; it is that one called " yarrow :" the other 

 species, called by the people " waubeen," belongs to the genus 

 Macrodon of Miiller and Troschel. 



