184 BACKBONED ANIMALS. 
For other accounts, and very complete history of the family, see ‘‘ Re- 
port of Fish Commission,” 1880. 
Angel-Fishes (Chetodontide).—The Chetodon rostra- 
tus of Java has elongated jaws, through which, according 
to Cobbold and others, it can shoot drops of water at in- 
sects on overhanging bushes (Fig. 226). The archer-fish 
( Zoxotes) has a prolonged under jaw, and by the same au- 
thorities is also accredited with shooting powers. 
Surgeon- Fishes (Acanthuride).—The doctor-fish- 
es are common on the Florida reef, and are at times 
found farther north. They are from six to eight inches 
long, and have at the side of the narrow, keel-like por- 
tion of the tail a lance-like blade that can be thrown 
out at will, and proves a dangerous weapon.” 
Climbing- 
Fishes (Labdyrin- 
thici).—These fish- 
es, mostly from the 
East Indies, are 
noted for their pow- 
ers of living out of 
watér. To this end 
they have accesso- 
ry gill-cavities, or 
labyrinthine organs 
(Fig. 227) that con- 
Fic. 227.—Anabas scandens : head, with #, the ae 
gill-cavity, laid open, and /, cavity contain- tain air and not wa- 
ing the foliated labyrinthine structure. ter, as often stated. 
NotTe.—The Anaéas (see frontispiece) has been known to live out 
of water for five or six days, and makes long trips overland when 
the pools dry up. In certain parts of India they have been seen leav- 
ing the water in schools and crossing the country, using their pectoral 
* In specimens kept in an aquarium on the Florida reef they were 
found to be extremely pugnacious, striking their knives against all 
new-comers, lacerating and cutting them severely. 
