BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
EXPLANATION OF PLATES. 
All the figures, with the exception of those of Plate 2, were outlined with the 
aid of an Abbé camera lucida. 
The high magnifications were obtained mostly by the use of a Zeiss 1.5 mm, 
apochromatic homogeneous immersion objective with No. 4 compensating ocular. 
LIST OF ABBREVIATIONS. 
ann. Ring of protoplasmie granules. 
ax. Cylindrical axis of the “nipple” 
in Trichonympha. 
cil, Cilia. 
csp. Tooth-like processes of the inner 
surface of the outer layer of 
the “bell.” 
dewmer. Deutomerite. 
‚for. lig. Wood fibre. 
So: Flagellum. 
Sis. Fissure. 
mu. Muscle. 
nl. Nucleus. 
nll. Nucleolus, 
pd. Peduncle. 
pil. Cap. 
pli. Fold. 
primer.  Protomerite. 
pr’pl. Coarsely granular protoplasm 
of “bell.” 
prpl. Finely granular protoplasm, 
making up most of the con- 
tents of the “ bell.” 
prpl. ax. Protoplasm situated in longitudi- 
nal axis of the bell of Tricho- 
nympha, which is coarser and 
more deeply stained than the 
surrounding protoplasm. 
spo. Spores of a fungus, 
ae Inner layer of “nipple” and 
“bell” of Trichonympha. 
ie Middle layer of same. 
Be: Outer layer of same, 
st. ctx. Cortical layer of granular 
protoplasm. 
st, gran. The granular protoplasmic 
layer separating the “bell ” 
from the posterior part 
(body) of Trichonympha. 
st, gran.’ Granular protoplasm marking 
the region of transition from 
the superficiak (ectosarc) to 
central (entosarc) portion 
of the protoplasm in the 
posterior half (“body ”) of 
Trichonympha. 
st.str. Striated layer of the “bell” 
of Trichonympha. 
tub. Knob-like enlargement of the 
anterior end of the proto- 
plasmic axis of the “nip- 
ple,’ Trichonympha. Also 
knob-like structure at the 
anterior extremity of Pyrso- 
nympha. 
