. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. 6.] THE CESTODE MONIEZIA EXPANSA. 275 all, and on the lower surface the segment next to a narrows toward the left and ends at the edge. Figure 35. The figure shows a complex case of partial division (a) and a spiral of about four turns (b c). The region a is partially separated into two segments at the right, but at the left into three, the most anterior (b) forming the beginning of the spiral. On the lower side, just beneath /;, there is a small region wholly marked off by furrows and not form- ing part of the spiral. T
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. 6.] THE CESTODE MONIEZIA EXPANSA. 275 all, and on the lower surface the segment next to a narrows toward the left and ends at the edge. Figure 35. The figure shows a complex case of partial division (a) and a spiral of about four turns (b c). The region a is partially separated into two segments at the right, but at the left into three, the most anterior (b) forming the beginning of the spiral. On the lower side, just beneath /;, there is a small region wholly marked off by furrows and not form- ing part of the spiral. The spiral b c is perfectly simple in form, though rather long. This case, like Fig. 34, was found near the anterior end of the chain, and neither genital organs nor inter-proglottidal glands are formed. Figure j6. The figure is a dorsal view of an extremely long spiral, which makes seven complete turns about the body. The spiral is due to the bending posteriorly of the ventral furrows near the right edge. At the left the segments are all normal in form, and all of the genital organs are normally placed. At the right the curve in the ventral furrows produces complex relations in the various segments. All of the curved portions of the ventral furrows except the one anterior to c are much shallower than the transverse parts, as is indicated in the figure. In the one exception, the furrow anterior to c, the curved portion appears as distinct and deep as the rest of the furrow. In a, b, d, c, and / the inner portions of the organs of the right side are seen to lie in about their normal positions with respect to the boundaries of their segments. The ducts are parallel to the dorsal furrows and cross the course of the ventral furrows in each case, , they conform to the relations on the dorsal side. In the segment c, however, the ducts run nearly parallel to the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
