Apr.-'Sept., 1914 
Illustrations 
XIII 
Fig. 8. Two half-sections of Citrus root magnified 30 diameters: a , Healthy 
root; b, diseased root. 
9. Tylenchulus semi penetrans: Posterior portion of adult female. The 
portion shown is located outside of the Citrus root, a, Blind end of 
the coiled single ovary; b , anterior portion of ovary; c, posterior 
portion of ovary; d , renette cell; e, duct of the renette cell; /, excre¬ 
tory pore; g, vulva; k, terminus; *, uterus; j, cuticle; k, somatic 
granule; l, junction of ovary with uterus; m, posterior end of ovary 
with ovum ready to enter uterus.. 
10. Pot containing Citrus seedling, a, Brood capsule; b, label of same at¬ 
tached to capsule by means of a thread which passes down through 
the soil.. 
11. Longitudinal section of a glass brood capsule enlarged 10 diameters. 
a, Glass tube shown in longitudinal section; 6, thread encircling 
capsule, shown in cross section; c, finest mesh linen cloth held over 
bottom of filter capsule by the encircling cord b; d, layer of filter 
paper, for convenience shown black; e, f , disks of filter paper; g, 
nematode egg embedded in Pasteurized orange-root detritus and 
soil granules. 
12. Mononchus papillatus Bastian: Rather immature female specimen 
which has been feeding upon Tylenchulus semipenetrans. a , Two 
of the innervated papillae existing on one of the six mobile lips; 
b, one of the lips; c } dorsal pharyngeal tooth; d, one of the three 
longitudinal chitinous ribs of the pharynx; e , pharyngeal cavity; 
/, oesophagus; g, muscular layer of the body; h , cuticle; i, one of 
the cells of the intestine; j, j , /, oral spears of three ingested Tylen- 
chuli; the spear in the intestine near the vulva is accompanied by 
an undigested portion of the lumen of the oesophagus of the Tylen- 
chullus; k, nerve ring; l, blind end of the anterior ovary, which, being 
behind the intestine, shows less clearly than the posterior ovary; 
m, nucleus of one of the intestinal cells; n, vulva; 0, anus; p, 
terminus; q, anal muscles; r , rectum; s, cardia; t, spicula of an 
ingested male Tylenchulus.. 
13. Tylenchulus semipenetrans: Young female about to undergo its second 
molt, a, Lip region; b, spear; V, spear which has been sloughed 
off; d , lumen of the oesophagus; e , median oesophageal bulb;/, 
nerve ring; g, cardiac oesophageal bulb; h, beginning of the in¬ 
testine; k , larger intestinal granules; n, excretory pore; n\ renette 
cell; o / , blind end of single immature ovary; r, developing 
uterus; V, remnant of rudimentary anus; i, terminus. 
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Pelucularia Koreroga on Coffee in Porto Rico 
Fig. 1. Early stage in development of group of hold-fast cells of Pellicularia 
koleroga . 
2. Appressoria of Venezuelan candelillo fungus from an old, fully de¬ 
veloped specimen. 
3. Spores of a fungus accompanying Pellicularia koleroga . 
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232 
232 
