488 REPORT OF THE HARVARD AFRICAN EXPEDITION 
as the base of the lip region, about three microns apart and probably three in 
number. The emptying place of the dorsal oesophageal gland is visible just 
behind the base of the spear, as is usual in T'ylenchus. The oesophageal glands 
are not very strongly developed. The narrow oesophageal tube leading to the 
median bulb is strongly cutinized and refractive and is a marked feature of the 
neck. The ellipsoidal median bulb, very distinctly set off both fore and aft, 
is a little more than half as wide as the neck and is supplied with a central 
strongly refractive ellipsoidal valve, 2.8 microns in diameter, — one-fourth as 
wide as the bulb itself. Behind the median bulb the oesophagus for some 
little distance is only about as wide as the distance between two of the adjacent 
annules, 7.e., about two microns; thence backward it gradually widens out, 
however, so that at the base of the neck it is a little more than half as wide 
as the corresponding portion of the body; the lining of the oesophagus is here 
very faint, and there is no distinct cardiac swelling. There is no cardia. The 
beginning of the intestine is quite evident on account of differences in structure, 
but there is no very obvious constriction between the oesophagus and the in- 
testine. The cells of the intestine are packed with relatively large granules, 
presumably of a fatty nature, the largest of which are one-fourth as wide as 
the body; among these are other granules of very, very much smaller size. 
There is no distinct tessellated effect caused by the arrangement of the large 
granules of the intestine, but the granules are so large as to impart the peculiar 
vesicular appearance (irregular pattern) always present in the nemic intestine 
of tylenchs when the granules are numerous and of large size and highly re- 
fractive. This granulation obscures, for the most part, all other details of the 
intestine. The intestine becomes at once nearly three-fourths as wide as the 
body, and in the single specimen under examination has much the same struc- 
ture throughout its length. The body of the male begins to taper, very gently, 
at a distance in front of the anus somewhat greater than the length of the tail. 
From the massive raised anus the tail, compassing about twenty-two annules, 
is conoid to the acute, or subacute, terminus, diminishing rapidly behind the anus 
so that at a distance from the anus about equal to one-half of the anal body 
diameter it is only about two-thirds as wide as at the anus. There is a well- 
developed transparent bursa, compassing about forty-two annules, arising laterad 
very gradually from a point as far in front of the anus as the terminus is behind 
it, and sufficiently well-developed so that, with the nema in profile, opposite 
the anus it projects beyond the body contour a distance equal to the correspond- 
ing radius of the body. From this point it curves in a uniform convex manner 
to the terminus. The prominently striated crenate bursa barely includes the tail; 
its striae coincide with those of the cuticle of the tail. There are two small 
phasmids(?), or bursal ribs, located at the beginning of the middle fifth of the 
tail; these extend about halfway to the margin of the bursa and it is quite 
apparent that they are really lateral in their origin. This suggests that they 
are, possibly, phasmids rather than bursal ribs. The excretory pore lies just 
behind the oblique nerve-ring. The two equal, arcuate, colorless spicula, — 
about one and one-fourth times as long as the anal body diameter, — at their 
