432 THE PARASITES OF THE TERMITES. 



rina, and as represented in Figs. 5, 7, 9. I have, however, not been able posi- 

 tively to satisfy myself that this striated condition actually pertains to the ectosarc 

 of Trichoiiyni'pha, and have suspected that the appearance was an illusion produced 

 by the long cils which invest the animal. 



A large spherical nucleus is constantly to be observed in Trichonympha situ- 

 ated centrally at the conjunction of the two divisions of the endosarc, as seen in 

 Figs. 1-10. It always maintains this position in all the movements of the animal. 

 It has usually appeared to me to be imbedded within the fundus of the head 

 endosarc, as seen in Fig. 8, though sometimes I felt in doubt whether this was 

 actually the case. It is more or less distinctly and uniformly granular. 



Commonly the nucleus of Trichonympha appears surrounded by a light ring 

 or halo, but occasionally it is to be seen inclosed within a second and considerably 

 larger and faintly granular sphere, as represented in Figs. 9, 10. No other defi- 

 nite structural elements than those above described were observed in the interior of 

 Trichonympha, no appearance of reproductive elements, nor any trace of vessels. 



The most remarkable character of Trichonympha is its wonderful cloak of 

 vibrating cils. No other animal of which I have any information has the append- 

 ages of such great length. They appear to emanate altogether from the summit 

 of the head, and spread outward and backward enveloping the animal, and extend- 

 ing a considerable distance beyond its posterior extremity. They originate in 

 several series, or circles in succession, three or four as it seems to me, as repre- 

 sented in Figs. 1-3, 5, 7, 9, 10. 



The first series of cils start immediately back of the pointed summit of the 

 head, and are the shortest. They extend upon the sides of the head and inces- 

 santly wave outwardly. 



The second series of cils proceed from a circle immediately behind the former, 

 and extend outward and backward to the fore part of the body. These wave out- 

 wardly like those of the first rank of cils. 



The third series, starting from the head beneath the former, spread downward 

 and inward or outward over the body to its posterior extremity, or beyond it to an 

 extent proportionate with the shortening of the animal. The second rank of cils 

 gently and incessantly vibrate, and are continually lifted and depressed or open 

 and close. The motion occurs regularly and uniformly all around, or it may occur 

 to a variable degree partially, and more actively in one direction than in another. 

 The motion reminded me of the gentle streaming of a delicate sheet of water from 

 the edge of a fountain vase, and if displayed more on one side than another it 

 resembled the same sheet swayed by the wind. 



