. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TYPES OF NEPHRIDIA IN NEMERTEANS 213 Uebl -Pc cLj Lee. -ned FIG. 15. C. spiral is. Diagram of cephalic protonephridium of male, showing the isolated flame cells (fc), with the terminal chambers (tc) leading to the slender end canals (cc) and thence to the collecting tubule (ct), convoluted tubule and efferent duct; ebl, epithelial lining of cephalic blood lacuna. FIG. 16. Gconcmcrtcs agricola. Diagram of single nephridium with a cluster of slender terminal chambers (tc) and binucleate flame cells (fc) leading by the narrow e
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TYPES OF NEPHRIDIA IN NEMERTEANS 213 Uebl -Pc cLj Lee. -ned FIG. 15. C. spiral is. Diagram of cephalic protonephridium of male, showing the isolated flame cells (fc), with the terminal chambers (tc) leading to the slender end canals (cc) and thence to the collecting tubule (ct), convoluted tubule and efferent duct; ebl, epithelial lining of cephalic blood lacuna. FIG. 16. Gconcmcrtcs agricola. Diagram of single nephridium with a cluster of slender terminal chambers (tc) and binucleate flame cells (fc) leading by the narrow end canals (cc) to a thick-walled convoluted tubule (con) and thence to the efferent duct (ncd) ; /, tuft of long cilia; ntc, nucleus of terminal chamber; circular bars on wall of terminal chamber. COMPARISON WITH OTHER FORMS With the exception of the metanephridia of the females of species belonging to the family Cephalotrichidae, the excretory systems of all nemerteans in which such organs have been discovered are of the protonephridial type. In the numerous species of hathypelagic nemer- teans, as well as in the littoral Prosadcnoponis, no trace of an excretory system has yet been found. Characteristic of the vast majority of species is a system of simple. 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 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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