440 



s. isiiii : 



I have observed the animal attached to the epithelium of host intestine 

 by the small epimerite. 



Protomerite half-moon-shaped, more or less 

 compressed antero- posteriorly, always broader 

 than long. 



Deutomerite rather obconical, broadest close 

 to the septum, narrowing posteriorly and ending 

 with obtuse end ; usually 3 or 4 times as long 

 as the protomerite. The constriction between the 

 two segments of body is in most cases not con- 

 spicuous, often nearly so obsolete as to obscure die 

 distinction between protomerite and deutomerite. 



Epicyte thin, especially so in protomerite. 

 Sarcocyte thin near the septum, but thicker 

 towards the posterior end of deutomerite ; thick- 

 end also along the anterior end of protomerite. 

 Septum very thin, inconspicuous. Endocyte very 

 dense and dark in both segments, lighter towards the posterior end 

 of deutomerite evidently owing to the thinning of body. 



Nucleus can not be clearly seen in living specimens, it being 

 deeply imbedded among endocytic granules. It is situated usually in 

 the broadest portion of deutomerite. In many cases the body is bent 

 toward one side, giving rise to a shape remotely resembling that of 

 a comma. 



Cyst large, spherical or somewhat ovoid. 

 Measurements : 



A E C D E 

 Length of protomerite, 28 fi, 28 //, 32 fi, 24 fx, 20 fx. 

 Length of deutomerite, 112 /x, 112 ;x, 116 fx, 80 ft, 100 fx. 



Fig. 4. 

 Steinifta obcomca n. sp. 

 A ccphalont. 360 x . 



1) The so called " bouton aplati " of LÉGER et DUBOSCQ (" Nouvelles recherches sur 

 les grégarines et l'épithélium intestinal des Trachéatcs," Arch. f. Protistenk., Bd. 4., 1904.) 

 is likely something different from true epimerite. 



