. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. michaelsen: African oligochaeta 445 edges narrowing the lumen; the muscles of this middle portion are not noticeable; the muscular duct of the spermatheca is somewhat shorter than the middle portion and somewhat, if not much, thinner, mod- erately sharply set off from it with narrow, smooth, axial canal. A diverticulum, about half as long as the middle portion, discharges into the ectal part of the middle portion against which it is inclined. I have examined the diverticula of two specimens, only two of these eight di
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. michaelsen: African oligochaeta 445 edges narrowing the lumen; the muscles of this middle portion are not noticeable; the muscular duct of the spermatheca is somewhat shorter than the middle portion and somewhat, if not much, thinner, mod- erately sharply set off from it with narrow, smooth, axial canal. A diverticulum, about half as long as the middle portion, discharges into the ectal part of the middle portion against which it is inclined. I have examined the diverticula of two specimens, only two of these eight diverticula (one from each specimen) are simple pear-shaped with a. Fig. 7. Dichogaster kaburomina. Spermatheca made transparent. short narrow duct and containing a simple sperm ball; in five of the other diverticula the broad blind end was more or less deeply cleft, the contour of the diverticulum became heart-shaped. The sperm space also is paired, the two parts of it being separated from each other over a more or less lengthy tract, frequently for nearly their entire length. In one of the diverticula examined there is a third sperm space in addition to the two already mentioned. This, however, is not placed in the plane of the others but is situated somewhat lower and nearer to the common stalk of the diverticulum; in the 4 sper- matheca of one specimen which had a narrow middle portion, the latter were empty, in the spermathecae of another worm with a broader middle portion, the latter held a thecacystis with a large, oval, almost globular head and a short, narrow tail extending into the ectal part of the narrow axial canal of the muscular Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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