1088 



PARASITES OF PROTOZOA 



motile phase that passes from one host to another; and it has no tentacles 

 at any time. Endosphaera has been found in vorticellids of the genera 

 Vortjcella, Zoothammum, Ephtylis, Carcheshim, Tvichodma, and 

 Ophthonecta. All these have been assigned to the species £. engehnanni 

 Entz, the most adequate study of which was published by Lynch and 

 Noble (1931). G5nnert (1935) described E. inultifiliis, reporting it 

 from the Suctoria Lernaeophrja capHata Perez, Trichophrya epistylidis 

 CI. and L., Tokophryidae, and Dendrosoma; and from vorticellids. 



Figure 225. Ophthonecta henneguyl, parasitized by Endosphaera engehnanni. End. 

 emb., Endosphaera containing an embryo; dis. emb., embryo being discharged through 

 birth pore. (After Lynch and Noble, 1931.) 



Lynch and Noble found a high incidence of infection in Ophthonecta 

 henneguyl, with as many as twelve parasites, most of which contained 

 one or occasionally two or three internal embryos. They found each 

 parasite to be attached to the pellicle of the host by a short stalk, per- 

 forated by a canal terminating in a birth bore. The spherical embryo, 

 provided with three equatorial bands of cilia, was discharged through 

 this pore. Embryos were observed to attach themselves to the host, and 



