52 GEEGARI^'ID^ 



or depressed, and are frequently provided with a 

 peculiar fish-like tm\ {Jig. 11, g). They consist 

 of a somewhat tough external membrane, within 

 which are two or more oblong vesicles, usuallji 

 situated near the anterior extremity of the body. 

 In addition to these a globular mass of organisable 

 matter may often be observed. Lieberkiihn has 

 shown that, under certain circumstances, the Pso- 

 rospermiicB may burst, when the globular mass, thus 

 liberated, mil be found to resemble the amcebiform 

 bodies resulting from the rupture of the pseudona- 

 viculae above referred to. Hence it is exceedingly 

 probable that the Psorospermice are identical with 

 the pseadonaviculae of true Gregarinidce. 



