1915,] NATURAL SCIENCES OF PHILADELPHIA. 203 



NOTES ON NEMATOGNATHOUS FISHES. 

 BY HENRY W. FOWLER. 



The present account comprises an annotated list, with descrip- 

 tions of several "new species, belonging to the Ostariophysian order 

 Nematognathi, contained in the collection of the Academy. 



SILURID^. 

 TACHYSURIN.'E. 



Felichthys pinnimaculatus (Steindachner). 



One from Panama. 

 Felichthys marinus (Mitchill). 



Harvey Cedars, Great Egg Harbor, Corson's Inlet, Sea Isle City, 

 New Jersej^; Womita Haulover, Nicaragua. 



Galeichthys felis (Linnseus). 



Bayport and Big Pine Key, Florida. 



Selenaspis herzbergii (Bioch). 



One example 137 mm. long from Dutch Guiana (Dr. C. Hering). 

 This closel}' resembles Hexanematichthys hymenorrhinus Bleeker^ 

 from "Guatimala, " a species not included in Regan's work on 

 Central American fishes, and usually merged with the present as a 

 synonym. My specimen agrees largely with Bleeker's figure of 

 H. hymenorrhinus, though he does not show the lateral line with 

 subequal, short, backwardly directed branches along its lower edge. 

 The teeth are shown differently on the palatines, as in my specimen 

 they are in enlarged and more approximate areas. My example 

 shows the internasal cutaneous ridge incomplete or only developed 

 at the sides, and the gill-rakers 8 + 15, while Eigenmann and Eigen- 

 mann give but 6 + 10 for S. herzbergii. 



Another example, young, from Paramaribo, Dutch Guiana (Dr. 

 C. Hering), representing Netuma dubia Bleeker. It has a distinct 

 cutaneous ridge uniting the hind nostrils, a character not shown in 

 Bleeker's figure.^ The maxillary barbels are also shorter, and do 

 not quite reach to the ventrals. 



1 Mem. Soc. Holl. Sci. Harlem, 1864, p. 57, PI. 11, fig. 2, PI. 13, fig. 4. 



2 L.c, p. 63, PL 13, fig. 5, PL 15, fig. 2. 



