102 GOBIOIDS. 



conical teeth on a transverse row at the anterior margin of both the 

 upper and lower jaw. Three or four similar teeth are arranged longi- 

 tudinally along the anterior end of the vomer. The palatines are 

 roughened by small callous papillae, but otherwise are edentulous. 

 In the Trachypterus Bogmarus there are six pretty large and sharp- 

 pointed teeth in the upper jaw, directed backwards towards the gullet ; 

 the lower jaw is armed with eight similar teeth. 



In the Vaegmaer or Deal-fish, {Gymnetrus arcticus) the intermax- 

 illaries and premandibulars are armed with small conical pointed 

 teeth. In the Gymnetrus gladius the maxillary teeth are so extremely 

 minute as hardly to be felt, and to be visible only with the aid of a 

 lens. 



In the Band-fish, [Cepola rubescens) there is a row of slender 

 pointed, slightly curved teeth on the outer margin of each jaw ; those 

 of the lower jaw projecting considerably. The vomer, palatine bones 

 and tongue are edentulous. 



In the Lophotes the palatines and vomer, as well as the intermax- 

 illaries and premandibulars, support teeth which are small and rasp- 

 like. 



The teeth of the Tsenioids or Ribband-shaped fishes resemble 

 those of the Sciaenoids in their microscopic texture, fixation, and 

 mode of reproduction. 



42. The Gobies {Gohius Lacepede) are distributed by Cuvier into 

 four subgenera according to modifications of their dental system. 

 The original generic term Gobius, is restricted by Cuvier to those 

 species which have only small villous or carding teeth on both jaws, 

 the anterior row being sometimes more developed than the rest. Of 

 this sub-genus our common Rock-fish {Gobius niger) is the type. 



The Gobies which have a single row of pointed teeth on each jaw, 

 and the lower series placed horizontally, with two teeth developed in 

 the form of canines behind them, form the family Apocryptida. In one 

 species of this group, {Amblyopus Hermannianus, Cuvier), the mouth 

 is cleft vertically, and the teeth are long, sharp-pointed, recurved, 

 and interlock when the mouth is closed ; there are eight or ten of 



