154 CALIFORNIA ACADEMY OF SCIENCES. 



155. Felichthys affinis (Steindachner.) 

 Localities: Sao Matheos; Para. 



156. Felichthys nodosus (Bloch.) 



Aachenipterasfurcatus Cuv. & Val. 

 Localities: Para; Bahia. 



XXXV. AucHENiPTERiCHTHYS Bleeker. 



157. Auchenipterichthys thoracatus (Kner). 



Localities: Coary; Hyavary. 



158. Auchenipterichthys longimanus (Giinther.) 



Localitieb: Manes, Rio Madeira; Cameta. 



XXXVI. Trachycorystes Bleeker. 



159. Trachycorystes glaber (Steindachner.) 



160. Trachycorystes isacanthus i,Cope.) 



161. Trachycorystes insignis (Steindachner.) 



162. Trachycorystes obscurus (Giinther.) 



163. Trachycorystes magdalenae (Steindachner.) 



164. Trachycorystes trachycorystes (Cuv. & VaL) 

 Trachycorystes typus Bleeker. 



165. Trachycorystes ceratophysus (Kner.) 



166. Trachycorystes porosus sp. nov. 



Types, No. 7351, two specimens; length .13-. 15 m. Brazil. 



Short and robust, little compressed; width of the head 

 about equal to its length, its depth IJ in its length. Bones 

 of the head coarsely granular. Fontanel oval. Snout and 

 sides of the head with conspicuous pores. Tliree grooves 

 on the occipital bone form a ^r-shaped figure, and are stud- 

 ded with pores; other pores on top of the head. 



Eye circular, 2 in the snout, 7 in the head, 4 J in the 

 interocular. 



Maxillary and post - mental barbels extending a little 

 beyond base of pectoral, mental barbels extending beyond 

 insertion of post-mentals, measuring If in the length of 

 the head. 



