74 JUSTIN M. ANDREWS. 



the individual and in the nucleus. Its length varies from 5 to 

 10 micra. It stains a flat black unless the preparation is strongly 

 decolorized, in which case it shows a granular composition, 

 within which appears a karyosome-like unit contained in a clear 

 unstaining vesicle (Fig. 4, A). In the resting stage, the nuclear 

 membrane is connected to the centroblepharoplast by a single 

 rhizoplast. 



NEUROMOTOR APPARATUS. 



In their paper dealing with Trichomitus termitidis, Kofoid and 

 Swezy ('19) list the organelles composing this "complex, structur- 

 ally integrated apparatus which links together the nucleus and 

 motor organs" as: a centroblepharoplast, the anterior flagella, 

 the undulating membrane, a posterior flagellum, a "parabasal 

 body," and a nuclear rhizoplast. To that category, we would 

 add, in describing Trichomonas termopsidis, an axostyle, and 

 would call the organelle referred to as the parabasal body by 

 Kofoid and Swezy, the chromatic basal rod, in view of the fact 

 that a body first called the parabasal body by Janicki ('n), and 

 later corroborated by Alexieff ('13), Kuczynski ('14), Janicki 

 ('15), Cutler ('19), and Wenrich ('21), is plainly demonstrable in 

 our preparations fixed in strong Flemming's fluid, osmic acid 

 vapor, or chromic acid. 



The centroblepharoplast (Centra., Fig. 2.), apparently a single 

 morphological unit while the trophozoite is in its resting stage, 

 appears as a small, round, blackly-staining dot about a micron in 

 diameter. It is closely applied to or embedded within the 

 anterior end of the chromatic basal rod, so that except during 

 division processes, its position is marked only by a bulbous 

 enlargement of the extremity of the chromatic basal rod. The 

 centroblepharoplast is always connected to the nucleus by one or 

 more nuclear rhizoplasts. From the centroblepharoplast spring 

 the four anterior flagella, the undulating membrane, the chro- 

 matic basal rod, the axostyle, and the parabasal body. 



The four anterior flagella (Ant. flag., Fig. 2) are about equal in 

 length, arise from the centroblepharoplast, and pass discretely 

 out of the cytoplasm. At the point of emergence, the cytoplasm 

 is usually raised to a small hillock. As the flagella leave the body, 

 they are frequently so intertwisted and woven together, that it 



