Synopsis of the Groups. 



Ventral tins united into one disk, or situated 



close together ; two separate dorsal fins . . a. Gobiina. 



The two dorsal fins united into one. Ver- 

 tebrae 11/17 b. Amblyopina. 



The two dorsal fins united into one. Ver- 

 tebrae 10/24 c. Trypauchenina. 



Ventral fins widely apart from each other ; 



two separate dorsal fins cl. Callionymina. 



Appendix. — Luciogobius. Oxymetopon. 



Synopsis of the Genera. 

 First group : Ck)biina. 



fenirak untied into one Jin. 



Ventral not adherent to the belly. Body scaly. 

 Teeth conical, fixed, those of the upper jaw 

 in several series 1. GoBius, p. 3. 



Ventral not adherent to the belly. Body scaly. 

 Teeth conical, fixed, those of the upper jaw 

 in a single series ; canine teeth none 2. Euctenogobius, p. 79. 



Ventral not adherent to the belly. Body scaly. 

 The upper jaw with a series of long teeth, 

 behind which are two groups of strong canine 

 teeth 3. Latruncdlus, p. 80. 



Ventral not adherent to the belly. Body scaly. 

 Teeth conical, fixed, those of the upper jaw in 

 a single series ; canine teeth at least in the 

 lower jaw 4. Apocryptes, p. 80. 



Ventral not adherent to the belly. Body scaly. 

 Teeth of the upper jaw in a single series, 

 emarginate, those of the lower horizontal ... 5. Evorthodus, p. 84. 



Body naked, cylindrical ; head not compressed. 



Teeth conical, fixed 6. Gobiosoma, p. 85. 



Head and body naked, compressed. Teeth 

 fixed, conical, lower jaw generally with two 

 canines near the symphysis 7. Gobiodon, p. 87. 



Ventral not adiierent to the belly. BoiSy scaly. 

 Teeth erect in both jaws, in a single series and 

 tricuspid 8. TRiiENOPHORiCHTmrs, p. 89. 



Body tubercular. Gill-openings reduced to a 



small foramen 9. Bentiiophilus, p. 91. 



Ventral short, adherent to the belly. Body 

 scaly. Teeth of the upper jaw moveable, in 

 a single series 10. Sicydium, p. 91. 



Ventral short, adherent to the belly. Body 

 naked. Teeth of the upper jaw tricuspid, in 

 a single series 11. Lenttpes, p. 96. 



