196 
Two sorts of Pegasus, — Natans and Lancifer, are found in 
Australia : fhe first in Queensland, and the second on tlie coast 
of Tasmania ; but I have not yet seen either. 
Ol'der V. LOPHOBIiATsCHII. 
“ The Gills are not laminated, hnt composed of 
rounded lobes, attached to the branchial arches. 
Gill-cover reduced to a large simple plate. Air- 
bladder simple, without pneumatic duct. A dernal 
skeleton, composed of numerous pieces arranged in 
segments, replaces more or less soft integuments. 
Muscular system not much developed. Snout 
produced. Mouth terminal, small, toothless, formed 
as in Acanthopterygians.” 
SYNGNATHIDA]. 
“ Gill-openings reduced to a very small opening 
near the upper posterior angle of the gill-cover. 
One soft dorsal fin ; no ventrals, and sometimes one 
or more of the other fins also absent. 
“ Chiefly marine fishes, occurring in all parts of 
the tropical and temperate regions ; many species 
entering fresh waters.” 
HIPPOCAMPUS. 
This name was given by Dr. Leach to the fish commonly 
known as Sea Horse, and has been adopted by all authors. It 
has since been restricted, and Dr. Gunther gives the genus the fol- 
lowing characters “ Trunk compressed, more or less elevated, 
composed of from ten to twelve rings ; shields with more or less 
prominent tubercles or spines ; occiput compressed into a crest, 
terminating at its superoposterior corner into a prominent knob 
(coronet). Supraorbital, temporal, and humeral regions, with 
