XIII 



PHYLUM CHORDATA 



223 



This is a small sub-order, including the File-fishes, Globe-fishes, 

 Suu-fishes and Coffer-fishes (Fig. 880). 



'7 



pclj 



Fig. SSO. — Ostracion (Coffer-fish), hr. ap. branchial aperture ; d.f. dorsal flu ; pct.f. jiectoral 



fin; i-.f. ventral fin. (After Day.) 



Siib-order f. — Lopli ohrcmchii. 



Teleostci having no pneumatic duct. The gills are not comb- 

 like, but have their filaments arranged in tufts (Fig. 881, B). Tlie 



Fig. S.sl.— Hippocampus (Sea-hur.so). In B the oiierculum is removed to show the gills, 

 Or. ap. branchial aperture ; bnl. p. brood-iJoueh ; d.f. dorsal fin ; g. gills ; XHt. f. pectoral fin. 

 (From Claus and Giinther.) 



