1887.] MICROSCOPICAL JOURNAL. 225 
Type A (see fig. 1) was most common, and seems to be in some ways 
similar to that type of the white ant series named by Leidy 77¢chonympha 
agilzs. It has not the long coma distinctive of the latter, but instead seems 
to have a shorter development at each end, that at what may be called the 
head end being usually set oblique to the general direction of the body. It 
is not impossible that the coma at the tail end is formed of the ends of fila- 
ments inserted near the head or along down the body ; but, if so, it has not 
the capability of the free swirling motion frequently noticed in the coma of 
trichonympha, and the appearance was not very unlike the accompanying 
sketch. The color was a light semi-transparent gray, with a few darker 
spots, and usually an appearance as of a nucleus. 
Their movements were quite lively at first, but they do not seem to be as 
hardy as ¢rzchonympha, so that they could only be observed for a few moments, 
after which motion ceased and dissolution set in. 
Another especial point of difference between this type and ¢rzchonympha 
is the absence of the marked spiral form of structure so peculiar to the sup- 
posed immature forms of that type. In point of size they are not very difter- 
ent, ranging from 50 to 75 » in length by 20 to 30 » in diameter. 
The form represented in figure 2 is, perhaps, another stage of A, though 
it presents quite noticeable points of difference. The head end is quite pointed, 
the coma radiating and flowing backward from it as in ¢réchonympha, 
though not nearly as long, while the body, as awhole, increases in size toward 
the tail, giving it a marked conical aspect. At the tail-end, as in A, is 
found a short, bristling coma. 
In point of size, these were rather smaller than A, ranging about 50 » in 
length by 15 in diameter. 
The form C (see figure 3) has the appearance of being quite distinct and 
remarkable. It was about 130 » in length by 75 » in breadth, with sluggish, 
though quite distinct, movements. The chief peculiarity, as shown by the 
figure, is the abnormal development of hair-like filaments all over the body 
surface, giving it quite the appearance of a porcupine, or a hedge-hog at bay. 
No differentiated internal structure could be observed in this form, per- 
haps on account of the great development of coma. 
In D (see figure 4) we have another apparently quite distinct, and perhaps 
the most remarkable,form. It was the largest in size, ranging from 130 to 
160 » in length, with proportionate breadth, as shown. In motion it is 
slightly similar to Leidy’s Pyrsonympha vertens, though totally different in 
appearance. 
As far as observed, what may be called the hinder portion of the body is 
little moved, if at all. The outline and structure of this portion seemed to 
be more or less vague and indistinct. Not so, however, with the head-end, 
which is a well-defined, somewhat mora/a-shaped, object, bristling all over 
with short hairy filaments or spines. This the creature raises and waves 
about in all directions with a ponderous swaying motion, the remainder of 
the body remaining stationary. 
An object more threatening or forbidding in appearance than this as it 
waves its knotty, spine-covered head about, is seldom to be found in micro- 
scopical research. 
Lastly, we have the form E, figure 5. This has much the appearance of 
a nematoid worm. In size they were about to » long by 2 » in diameter. 
No differentiation into head or tail-end was observed. ‘They were frequent 
and lively in their movements. 
Taken as a whole these parasites were far less numerous than those usually 
found in the white ant. They were also less hardy, rendering their observa- 
tion for any great length of time impracticable. 
