506 Suborder Jugulares 
The Trichonotide, with wide gill-openings and cycloid scales, 
are also related to the Callionymide. The species are few, small, 
and confined to the Indian and Australian seas. Another small 
family closely related to this is the group of Hemerocetide of 
the same region. 
The Dactyloscopide.—In this and the preceding families of 
jugular fishes the ventral rays remain 1, 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 Dactyloscopide from the Uranoscopide and Lepto- 
scopide. LDactyloscopus 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 Trachinide and 
Blennistde., 
