OSTEOGLOSSIDiE, 653 



long. The colonists in New Zealand name it " Sand-eel," as it 

 frequents bays with sandy bottom. It is eaten. 



Nineteenth Family — Hyodontid^. 



Body covered with cycloid scales; head naked ; harhels none. 

 Margin of the upper jaw formed hj the intermaxillaries niesially, 

 and hy the maxillaries laterally, the latter being articulated to 

 the end of the former. Opcrcidar apparatus complete. Adipose 

 fin none ; the dorsal fin belongs to the caudal piortion of the 

 vertebral column. Stomach horseshoe-shaped, ivithout blind 

 sac ; intestine short ; one pyloric appendage. Fseudobranchice. 

 none ; air-bladder simple. Gill-opienings ivide. The ova fall 

 into the abdominal cavity before exclusion. 



One genus and species only {Hyodon tergisus) is known, 

 generally called " Moon-eye." It is abundant in the western 

 streams and great lakes of ISTortli America. From 12 to 18 

 inches long. 



Twentieth Family — Pantodontid^. 



Body covered ivith large cycloid scales ; sides of the head 

 osseous. Margin of the upper jaio formed by the single inter- 

 maxillary mesially, a7id by the maxillaries laterally. The 

 dorsal fin belongs to the caudal portion of the vertebral column, 

 is short, opposite and similar to the anal. Gill-openings wide; 

 gill-covers consisting of a prceoperculum and opercidum only. 

 Branchiostegals numerous. Pseudobranchicc none ; air-bladder 

 sinnple. Stomach without coeccil sac; one pyloric appendage. 

 Sexual organs loith a duct. 



A small freshwater -fish (Fantodon buchholzi), singularly 

 alike to a Cyprinodont, from the west coast of Africa. 



Twenty-First Family — OsTEOGLOssiDyE. 

 Body covered with large hard scales, composed of pieces like 



