. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 48 WESLEY R. COE. of the esophagus and open into the lumen of this portion of the alimentary canal. In a recent study of a species of the same genus (Tcsniosoina cingnlatuin Coe) from the Hawaiian Islands, I have found a very similar In this species the nephridial ducts are profusely branched, and extend through the posterior three fifths of the esophageal region. The branches are of rather large size and are situated on the lateral walls of the esophageal blood lacunae, in close contact with the epithelial linin
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 48 WESLEY R. COE. of the esophagus and open into the lumen of this portion of the alimentary canal. In a recent study of a species of the same genus (Tcsniosoina cingnlatuin Coe) from the Hawaiian Islands, I have found a very similar In this species the nephridial ducts are profusely branched, and extend through the posterior three fifths of the esophageal region. The branches are of rather large size and are situated on the lateral walls of the esophageal blood lacunae, in close contact with the epithelial lining of the blood spaces (Figs. I, 2, 3). The total number of efferent ducts is between ten and thirty on. nep eep FIG. I. Tifitiosoma cingulatum. Portion of transverse section of body through esophageal region, showing efferent duct (»</) leading from a large nephridial canal (nep) through esophageal epithelium (eep)to lumen of esophagus (e) ; el, esophageal blood lacuna ; cu, cutis; olm and iltn, outer and inner longitudinal muscular layers respectively; tm, circular muscular layer ; /«, lateral nerve ; plm and fan, longitu- dinal and circular muscles of proboscis sheath. X 75- each side of the body, and those which open into the esophagus are interspersed irregularly with those opening upon the external surface of the body. The average position of those opening externally, however, is somewhat more anterior than that of those leading to the esophagus. The latter are more numerous than the former, and are much the more conspicuous. The appear- 1 Coe, W. R., " Nemerteans of the Hawaiian Islands, Collected by the Steamer Albatross in 1902," Hull. U. S. Fish Com., 1903, p. 984, 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 Biologic
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
