PHYLUM CIIORDATA 



401 



Teleostei they nearly always simply cross one another or 

 decussate. 



Most Teleostomi are oviparous, the eggs being impreg- 

 nated after they are laid. Many instances of parental care 

 of the young are known, the most familiar being that of the 

 male Stickleback, which constructs a nest of weeds fastened 



B 



FIG. 227. Hippocampus (Sea-horse). In B the operculum is removed to show the 

 gills, br. ap. branchial aperture ; brd. p. brood-pouch ; d.f. dorsal fin ; g. gills ; 

 pct.f. pectoral fin. (From Claus and Giinther.) 



together by a glutinous secretion of the kidneys, and 

 jealously guards the developing young. In the Sea-horse 

 (Hippocampus, Fig. 227) and the Pipe fish (Syngnathus) the 

 young are developed in a pouch in the abdomen of the male. 

 In Aspredo, one of the Cat-fish tribe, the eggs are pressed into 

 Man. Zool. D D 



