SYNOPSIS OF THE ARRANGEMENT OF FISHES. 181 



Bufichtkys. Mouth oblique ; eyes large ; anal fin long. 

 Trachicephalus. Dorsal fin emarglnate in the middle ; anal fin long. 



TmcHODON. Dorsal fins two ; preoperculum spined ; eyes 

 large; mouth sub-vertical. 



3. Sub-family Blepsin^. — Dorsal fin three-cleft ; ventrals 



minute. 



Blepsias. Head compressed. 



4. Sub-family Trachininje. — Mouth and eyes vertical ; 



body with compact scales. 



Urakoscopus. Body thick, cylindrical ; no operculate spine. 

 Ichthyscopus . Habit of Uranoscopus, but with only one dorsal fin. 



Trachinus. Body compressed ; dorsals two ; spine on the 

 operculum large. 



5. Sub-family Plattcephalin-s;. — Head broad ; ventral 



fins large. 



Platycephalus. Head broad ; ventrals behind the pectorals. 

 Bembras. Head not depressed ; ventrals before the pectorals. 



Family 4. COTTID^. 



Ventral fins very small, imperfect, of three, rarely of four rays ; 

 head broad, depressed, spined ; body wholly or partially 

 naked. 



Hemitripterus. Dorsal fins three-cleft ; ventrals small ; head 



depressed. 

 CoTTus. Body entirely naked ; dorsal fins two. 

 Hemilepidotus. Body with stripes of small scales. 

 Enofhrys. Body naked ; spines few ; ventral fins very long. 

 Gymnocanthus. Nape of the head contracted; eyes with 



bony orbits. 



Family 5. AGONID^. 

 Body long, slender, mailed with hexagonal plates ; ventral fins 



small, of two rays. 



Asphedophorus. Shaped like Cottus ; snout with two spines. 



Agonus. Body linear; no spines on the snout; mouth vertical 



HipPocEPHALus. Irregularly oval; nape much contracted; 

 dorsals two. 



Canthyrynchus. Body linear ; snout spined ; dorsal single. 



N 3 



