cence of the lateral cutaneous folds and provided with a cranial 

 opening near the vent, which can be closed by a circular muscle. 

 Littoral fishes of small size, represented by numerous species 

 in all tropical and temperate seas. They swim slowly in a 

 vertical position, head uppermost, by a vibrating movement 



Fig. 45. Hippocampus spinosissimus M. Web. X 3- 

 With front view of head. 



of the dorsal fin and attach themselves by the prehensile tail 

 to seaweed or other floating substances, and may be carried 

 by currents to great distances. 



Key to the indo-australian species of 

 Hippocampus. 



I. D. 27 31. 12 bodyrings H. abdominalis p. 108. 



II. D. 17 21. II bodyrings. 



