. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. coe: nemerteans of west and northwest coasts. 17 of the head. Their secretions are discharged mainly into the tubu- lar frontal organ. In the Lineidae the ce])halic glands do not extend behind the anterior border of the brain except in a few species, and they are commonly limited to the dorsal portion of the head except for a short distance near the tip of the snout, where they occur also in the ventral portion. In Linens rubescens a peculiar condition prevails, for here a very conspicuous duct lies directly beneath t
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. coe: nemerteans of west and northwest coasts. 17 of the head. Their secretions are discharged mainly into the tubu- lar frontal organ. In the Lineidae the ce])halic glands do not extend behind the anterior border of the brain except in a few species, and they are commonly limited to the dorsal portion of the head except for a short distance near the tip of the snout, where they occur also in the ventral portion. In Linens rubescens a peculiar condition prevails, for here a very conspicuous duct lies directly beneath the rhynchodaeum and leads forward from the more posterior glands, to discharge their secretions on the tip of the snout beneath the proboscis pore. In Geonemeetes these glands are enormously developed, and ,-,-'i>y. Fig. 3.— Amphiporus nebulosus. Transverse section through ventral commissure of brain, allowing very numerous submuscular glands {svv/j occupying a large portion of tissues of ventral half of body ; e, stomach ; re, rhynchocoel. discharge their secretions into a--large, tubular pit, situated immedi- ately dorsal to the rhynchodaeum. This pit not only discharges the secretions from the cephalic glands, but also serves as a highly spe- cialized sense organ (von Kennel, '78; Coe, : 04). Submuscular glands.— In many species of hoplonemerteans more or less numerous glands are found which in form and function resemble the true cephalic glands, but which are situated in the body parenchyma between or beneath the muscular layers of the body. 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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