PORTER: TRICHONYMPHA, 65 
3. Dinenympha gracilis. 
Plate 6, Figures 66-72. 
I have found it almost impossible to draw any sharp line of distinction 
between Dynenympha and the young of Pyrsonympha; in fact I doubt 
very much whether Dinenympha should be considered as anything else 
than a very early stage of a developing Pyrsonympha. 
Dinenympha never possesses a flagellum or a peduncle, although at the 
anterior tip of the animal there is frequently a deeply stained body resem- 
bling the tubercle of Pyrsonympha. The body of Dinenympha is long 
and slim, slightly flattened on one side, and generally twisted with one or 
two dexiotropic turns. Running parallel with this twist, but upon the 
convex side only, there are from seven to nine muscular cords, resem- 
bling those of Pyrsonympha ; but they often cause the surface to project 
much farther than is usual in Pyrsonympha, giving the animal a fluted 
appearance. This is shown in Figures 69 and 70 (Plate 6), which repre- 
sent the upper and lower surfaces respectively:of the same individual. 
Similar views of another individual are shown in Figures 71 and 72. 
The animal is generally almost devoid of cilia, except for a tuft at the 
posterior end (Figs. 67, 68), or occasionally a few cilia at both extrem- 
ities (Figs. 66, 69). Sometimes, however, it is thinly ciliated all over 
(Fig. 72). I think Leidy must have mistaken the undulatory motion of 
the muscular cords for the vibration of bands of cilia, for I have found 
that individuals with abundant cilia are rare. 
The nucleus is situated near the anterior extremity of the parasite ; 
it is oval and homogeneous, or finely granular, and sometimes (Fig, 66) 
shows a single darker structure like a nucleolus. The nucleus varies in 
size from 9 x 5.5 u to 5.5 x 3.6 u. 
The motions of the living Dinenympha are exceedingly interesting, 
but Leidy has amply described them. 
Dinenympha, like its companion parasites, lives on solid food ; but it 
possesses no discoverable oral aperture. 
4. Gregarinida. 
Plate 6, Figs. 73-76. 
Leidy (81, p. 441) speaks of having only once noticed a small Gre- 
garine among the other parasites of Termes. I have, however, found 
Gregarines very common in some hosts. They are found, almost with- 
