. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 96 H. Ulrich & R. M. Schmelz. Fig. 4. The worm fragment lying in the field of putative coelomic fluid. Same view as in Fig. 1, higher magnification in darkfíeld illumination. Intact hind end of worm above, injured end below. The worm fragment is c. 1400 //m long and 100-200 ¡Lim wide. It consists of 31 chaetigerous segments, considerably contracted towards the injured end. There are four chaetal bundles per segment, two lateral and two ventral ones. The dorsal h
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 96 H. Ulrich & R. M. Schmelz. Fig. 4. The worm fragment lying in the field of putative coelomic fluid. Same view as in Fig. 1, higher magnification in darkfíeld illumination. Intact hind end of worm above, injured end below. The worm fragment is c. 1400 //m long and 100-200 ¡Lim wide. It consists of 31 chaetigerous segments, considerably contracted towards the injured end. There are four chaetal bundles per segment, two lateral and two ventral ones. The dorsal half of the body surface is without chaetae. When viewed from the side with the best optical resolution (Fig. 5), the dorsal body surface is visible in the posterior half of the fragment. Only one lateral chaetal bundle per segment is visible here. Due to a successive torsion of the object, three chaetal bundles are discernible on the opposite side of the fragment, two ventral and one lateral. There are three chaetae per bundle in all observable cases, in fan-shaped arrange- ment. The distal part of each chacta is strongly curved, with a simple, pointed tip (Fig. 5, bottom right).The proximal part inside the body is not observable. The chaetae are fairly stout,estimated lengths and diameters are 40-50 //m and approx. 3 jum respectively. The lateral and ventral chaetae are alike. The chaetae appear to be thicker in lateral view than in top view. Each segment has a strong secondary annulation. There are 5-8 annuli per segment. The annuli on chaetal level are most prominent. Intersegmental furrows are observable in some segments as clearly marked furrows exactly halfway between the chaetae. The internal organization of the worm is indistinguishable. Dark brownish food pellets are visible inside the body over the entire length of the fragment including the posterior Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
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