1S1>7 I MICROSCOPICAL JOURNAL. HI 



<ler observHlion for four hours underwent five changes 

 and during- the heliozoaii phase captured and engulphed 

 six hirge forms of Hexamita inllata (vvliich were abund- 

 ant), three forms of Cercomonas longicauda and two forms 

 of Heteromita lens. Fiom this and a number of similar 

 observ^ations tlie writer feels justified in concluding that 

 this infusorian is truly carnivorous. 



Larger infusoria and those of greater consistency 

 when in contaet with the rays were visibly affected; they 

 seemed to ex})erience a shock, changed their routes and 

 slackened their j)ace. A number of large forms of the 

 very active Tre})omontis agilis were often found among 

 the rays and were not affected in the slightest manner. 

 Defecation was observed during both stages, but the flag- 

 ellate form was never seen to take food. 



During the heliozoan stage this form has no lecomotive 

 movement and is not anchored in any way; this last as- 

 sertion is clearly demonstrated by its being at the merc,y 

 of every current produced by a [>assing infusorian, worm 

 or rotifer. 



Saville Kent, in his manual of the Infusoria, mentions 

 an observation of his wherein he witnessed the develop- 

 ment of an Actino[)liry from a flagellate zcos})ore. In 

 his figure of the zoospore the contractile vesicle is [)laced 

 inllie posterior half, and in his figure of the Actinophry 

 the nucleus is centi'al. The position cf these two essen- 

 tials corresponds with the form here described. It may 

 be presumptuous, but ihe writer cannot helj) but incline 

 to the belief that if the Actinophry had been given a pro- 

 longed study it might have reverted to its original flag- 

 ellaie state and thus have rendered this record of a new 

 form unnecessary. 



Family. — Heteromitida?. 8. K. 

 Genus. — Heteromita. Dujardiu. 

 Species. — Heteromita ligulata (fig. 4) 

 Body ovate, cylindrical; one and a half to two times 



