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J. STEPHENSON. 
more longitudinal. Around the bases of these strands are a 
number of soft whitish lobular masses ; these are either one 
to each strand, or the lobules are fused at their bases to 
form a transversely extended mass enveloping the origin of 
several strands. The whitish lobular masses are arranged in 
about four transverse series, and the muscle strands emerge 
in a corresponding number of transverse rows. The most 
anterior portion of the mass is smooth, and represents the 
thick muscular and connective tissue wall of the pharynx 
itself. The condition is similar to that shown in PI. 19, 
fig. 1, for P. heterochae ta, omitting the masses in seg- 
ment Y. 
In segment Y, concealing the oesophagus, there is on each 
side posteriorly a considerable tuft of micronephridia, and 
anteriorly a mass of follicles of the so-called blood glands 
(cf. Beddard, 1) ; these latter rest against and are connected 
with the posterior face of septum 4-5 ; they interest us here 
because some are found more anteriorly, embedded in the 
cells of the posterior portion of the pharyngeal mass. 
On examining longitudinal sections through the anterior 
end of the worm the lobules previously mentioned are found 
to consist of the “ pharyngeal gland-cells ” of earlier authors ; 
these cells also penetrate in for some distance between the 
muscular fibres, which, crossing and interlacing, form the 
main portion of the pharyngeal mass. The pharyngeal 
lumen is lined by a columnar epithelium ; the ventral wall 
of the pharynx is thin, in contrast to the massive dorsal wall ; 
the muscular coat is here no thicker than the layer of 
epithelium, and the tc gland-cells ” are absent. 
Since these cells are certainly not glandular in the sense 
intended by previous writers, and since their function is not 
fully known, it is advisable to drop the earlier name. I 
propose to call them chromophil cells, because of their 
peculiar staining properties ; which, in sections stained by 
hsematoxylin, for example, render the masses immediately 
obvious even on a naked-eye inspection. 
The Chromophil cells (PI. 19, fig. 2). — The individual 
