MUSCLES OF CERATODUS 



Text-fig. 17. 



341 



Trarvi.vent.v 



Myotome 



■f^ peric perUon. . 

 duct 



proUfrfroni epit/v. 



Text-figs, 18-20. 

 Embryo 16 mm., horizontal sections ; Text-fig. 18 is the most dorsal. 



cuU&rcor 



azod. caps 



NO. 267 



A a 



