. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SYSTEMATICS OF ASPIDOBOTHREA or adhesive organ, although they grow progressively smaller toward the posterior end of the body where new ones are added. In this worm the posterior end of the body is rounded, but in other, larger specimens the region behind the adhesive organ forms a bluntly conical tip which is turned dorsallv at a right angle (Figs. 2, 3). In the worm shown in Figure 1. the pharynx is mm. in diameter. The testis is mm. long, mm. in dorsoventral measurement, and slightly behind the middle of th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SYSTEMATICS OF ASPIDOBOTHREA or adhesive organ, although they grow progressively smaller toward the posterior end of the body where new ones are added. In this worm the posterior end of the body is rounded, but in other, larger specimens the region behind the adhesive organ forms a bluntly conical tip which is turned dorsallv at a right angle (Figs. 2, 3). In the worm shown in Figure 1. the pharynx is mm. in diameter. The testis is mm. long, mm. in dorsoventral measurement, and slightly behind the middle of the body. The sperm duct passes forward on the ventral side of the body; at the level of the anterior end of the adhesive organ it expands to form a coiled seminal vesicle and the terminal portion of the duct, inside the cirrus sac, is surrounded by secretory cells. The cirrus sac is small, mm. ... FIGURE 3. Same specimen as Figure 2; reversed in photograph, to show the posterior end of the worm. The smaller specks in the photograph are eggs of the parasite. long, mm. wide, with a relatively weak muscular wall. The common genital pore is ventral, below the posterior end of the pharynx. The ovary is ovate to pyriform, mm. long and mm. in dorsoventral measurement, situated about one-fourth of the body length from the anterior end. The vitellaria consist of cords of follicles which extend in the ventrolateral areas from an anterior limit about 7 mm. from the anterior end of the body to almost the posterior end. In- dividual follicles are spherical to oval and measure from to mm. in diameter. The ootype region agrees with other descriptions of the species, and Laurer's canal opens to the surface a short distance posterior to the ovary. The uterus, which courses in coils posteriad from the ootype to the level of the testis and then forward to the genital pore, is filled with an enormous number of eggs. In the initial portion of the uterus the eggs are th
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
