506 Suborder Jugulares 



The Trichonotida, with wide gill-openings and cycloid scales, 

 are also related to the Callionymidce. The species are few, small, 

 and confined to the Indian and Australian seas. Another small 

 family closely related to this is the group of Hemeroccetidcz of 

 the same region. 



The Dactyloscopidae. In this and the preceding families of 

 jugular fishes the ventral rays remain i, 5, as in the typical 

 thoracic forms. In most of the families yet to be described 

 the number is I, 3, a character which separates the little fishes of 

 the family of Dactyloscopida from the Uranoscopidce and Lepto- 

 scopida. Dactyloscopus tridigitatus is a small fish of the coral 

 sands of Cuba. The other species of this family are found 

 mostly in the West Indies and on the west coast of Mexico. 

 Several genera., Myxodagnus, Gillellus, Dactylagnus, etc., are 

 recognized. In the structure of the shoulder-girdle these 

 species diverge from the star-gazers, approaching the blennies, 

 and their position is intermediate between Trachinida and 

 Blenniidcs. 



