242 SOME MINUTE ANIMAL PARASITES 



the genus Myxobolus has been most identified with 

 disease, and has been responsible for exterminating 



B. 



FIG. 43 LEPTOTHECA, FROM THE GALL - BLADDER OF THE 

 MACKEREL 



A, Trophozoite containing two spores, sp., Spores; ps., pseudo- 



podia 



B, One spore, showing its two valves, sporoplasm, and two polar 



capsules 



