certain brand of cocoa which was found to contain such seeds. Straw¬ 
berry seeds are frequently mistaken for parasitic material. As illustra¬ 
tions of the superficial resemblance between seeds and parasite eggs, 
there are figured here, the seeds of Indian mustard (Fig. 67), super¬ 
ficially resembling an ascarid egg of some sort; the seed of shepherd’s 
purse (Fig. 68), which if cleared to show this structure might resemble 
Fig. 77. A division stage in a gonidium of one of the green algae, Pleodorina 
californica. Enlarged. From Campbell, 1902, after Shaw. 
an echinorhynch egg or a nematode egg; the seed of the daisy fleabane 
(Fig. 69), which in outline is very similar to a whipworm egg; and the 
seeds of the bird’s foot trefoil (Fig. 70), to show the mfcropyle char¬ 
acteristic of seeds. 
A related body which is often found in feces in the spring is the 
Fig. 78. A unicellular plant, Chlorococcum sp., the one on the right showing 
division, x ca. 1000. From Campbell, 1902. 
pollen-spore of the pines, this pollen being distributed in clouds 
on a windy day and occurring over wide areas about pines. The 
pollen-spore (Fig. 71), has a 3-part structure, consisting of a central 
body and 2 wings, and is practically unmistakable. 
Various fungi produce cells or spores which call for some con¬ 
sideration as to identity the first time one sees them in feces. As 
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