430 Note on the Genus Ctenogobius. 



Note on the Genus Ctenogobius. 



This genus, first described at page 37-i, proves to have been 

 insufficiently characterized. The form of the head, in com- 

 parison with some other species of Gobies, can scarcely be said 

 to be long, and the plan of stating the extent of the squamation, 

 adopted in describing the other genera, was omitted in the 

 diagnosis of the present one. To remedy this defect, and to 

 more accurately restrict the genus, the following amendments 

 are made : 



The head is inflated, laterally oblong and subquadrate, and 

 with the profile before the eyes very descending. The eyes 

 are in the anterior portion of the head, nearly horizontal, and 

 closely approximated. The head, vertex, and nape are destitute 

 of scales, and the bare space extends, in the typical species, to 

 the front of the dorsal fin. 



The cleft of the mouth extends little further back than the 

 anterior border of the eye. 



The anterior row of large, subcylindrical recurved teeth on 

 the intermaxillaries extends along the greater portion of the 

 length of the jaw, and the teeth decrease in size from the 

 front : the mandibular row extends around the front only, and 

 the terminal one, on each side, is larger and more recurved than 

 the rest, and may be regarded as a canine. 



The form of the head in Ctenogobius has a generic resem- 

 blance to the Golrius Niger of Linnaeus. It especially diners 

 generically from that species by the naked vertex, and nape. 



