388 



Louise Hoyt Gregory 



ing to Biitschli, is the general rule, for when the mouth has shifted 

 from its original, anterior, terminal position to a ventral region, 

 the lines of cilia are moved also. The peristomial and pharyngeal, 

 as well as the membrane or plate region, are covered with long 

 fine cilia, which are easily seen in the pharynx, about the mouth, 

 and along the entire edge of the poster or lobe. These are of 

 uniform size, and three times the length of the cilia covering the 

 body. 



The ectoplasm is differentiated into two parts, one, the cuticle, 

 or pellicle, which is a thin membrane covering the entire surface 

 of the body; the second, the cortical plasm or alveolar layer (Biit- 

 schli, 1888), which lies directly beneath the cuticle. The cortical 

 plasm is a definite, well differentiated layer, easily distinguished 

 from the endoplasm (see Text Fig. i a). The cuticle and outer 







Fig. I a. Section through the cortical plasm and endoplasm showing the sharp differentiation between 

 the two structures, also the position of the basal bodies in which the ciHa take their origin. X 1200. 

 b. Semi-diagramatic surface view showing the raised squares and the insertion of the cilia. X 1200. 



portion of the cortical layer is raised to form minute papillae, such 

 as have been described in Lembadion (Biitschli '87), Paramecmm 

 (BiitschH '81, Maier '03, Schuberg '05), Frontonia (Schuberg 

 '05), Colpidium colpoda (Schewiakoff '87), Ophryoglena, Chilo- 

 don, Bursaria (Maier '03), Opalina, Nyctotherus (Maier '03, 

 Bessenberger '03.) 



A surface view or section shows the body to be divided into small 

 squares or hexagons, the "Feldchen" of Maier (Text Fig. i^). 

 These squares are raised in their centers, forming papillae, which 

 are definitely and clearly seen in profile on the edge of the body. 

 At each corner of the squares is a deeply staining body, the basal 

 granule, from which a cilium takes its origin. Thus the cilia lie 



