. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. XKMATODES IN SFA URCHIN GONADS 101 tubule and, in such cases, the gonads were shriveled distal to the sites of infection (Fig. 2F, G). In one dramatic example, two worms had lodged in the main tubule (probably the gonoduct I in the middle of one testis; spermatogenesis appeared l* •*•# *' eSP •. FIGURE 3. A testis of Ccntroslcplitinus coronatus infected with Echinocephalus, pscudo- iniciinitus showing a cyst containing one nematode (C) and a second nematode broken par- tially free of its cyst (N). The oral portion of the gon
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. XKMATODES IN SFA URCHIN GONADS 101 tubule and, in such cases, the gonads were shriveled distal to the sites of infection (Fig. 2F, G). In one dramatic example, two worms had lodged in the main tubule (probably the gonoduct I in the middle of one testis; spermatogenesis appeared l* •*•# *' eSP •. FIGURE 3. A testis of Ccntroslcplitinus coronatus infected with Echinocephalus, pscudo- iniciinitus showing a cyst containing one nematode (C) and a second nematode broken par- tially free of its cyst (N). The oral portion of the gonad is at the bottom of the photograph; note the normal-appearing aboral half of the gonad and the shriveled oral portion. Numbers 4. 5, and correspond to Figures 4 through 6; the scale line indicates 5 mm. 4. Section through the normal-appearing aboral portion of the testis in Figure 3, showing the gonoduct (G) surrounded by perithemal (P) and hemal (H) spaces, and the testicular tubules full of spermatogenic cells (S). FIGUKK 5. Section through the nematode in the testis in Figure 3, showing a portion of the nematode (N) and extensive nutritive phagocytic tissue (NP) in a tubule surrounded by a fibrous cyst w^all CO, and adjacent tubules full of spermatogenic cells (S). FIGURE 6. Section through the shriveled oral portion of the testis in Figure 3 just below the nematode, showing the germinal epithelium full of degenerating cells (D) and large perihemal spaces (P). Figures 4-6 are from 10 ^ paraffin sections stained with hematoxylin and eosin ; all are at the same magnification and the scale line in Figure 4 indicates 100 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
