. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 68 HENRY LESLIE OSBORN. side from the four blunt anterior papillae, and they are extended transversely to the animal. In form they are tapering and pointed, and slightly curved backward, in the form of a horn, extending considerably beyond the contour of the side of the animal. The oral sucker itself has a diameter of mm. The ventral sucker, while large, is smaller than the oral sucker, its diameter being mm. Its position in Fig. I is strikingly far forward ; in Fig. 7 it is more nearly in the center of the body. Thi
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 68 HENRY LESLIE OSBORN. side from the four blunt anterior papillae, and they are extended transversely to the animal. In form they are tapering and pointed, and slightly curved backward, in the form of a horn, extending considerably beyond the contour of the side of the animal. The oral sucker itself has a diameter of mm. The ventral sucker, while large, is smaller than the oral sucker, its diameter being mm. Its position in Fig. I is strikingly far forward ; in Fig. 7 it is more nearly in the center of the body. This difference is due to contraction of the neck in Fig. I, shown also by the winding course of the oesophagus of that specimen. The genital pore is located in front of and near to the ventral sucker, in the middle line. Eyes are present in younger speci- mens, but older ones do not possess them, though in these it is. - mu dv par mu czr mu Ion oj mm FIG. 5. Transverse section in level of the posterior spermary. Cam. luc. X II5- vt., vitellaria ; , dorsiventral muscle; , circular muscle of the body wall ; , longitudinal muscle of the body wall. possible to find scattered grains of pigment in the region of the pharynx, indicating their late disappearance. Looss repre- sents eyes in both the specimens figured by him, so that if they are not exceptional cases, the eyes persist to a much later time in the life history of B. nodulosa than of B. cornuta. The body wall presents the usual cuticle, destitute of spines. The usual muscle layers are present, .the fibers of the outer circu- lar layer are very fine indeed ; those of the longitudinal and oblique layers are exceptionally large. Parenchymatous muscle is some- what specially collected in each side of the body running dorso-. 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 perfe
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
