. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). 528 THE FUR SEALS OF THE PRIBILOF ISLANDS. £3^.. seen with difficulty. Ganglion not spherical, not large. Tentacles not numerous, apparently about twelve, presenting a peculiar distorted, shriveled appearance, situ- ated very close around the base of the siphon. (Fig. 23 A). Branchial sac consisting of about twelve series of long, narrow, regular stigmata. A well-developed muscle band in each in- terserial space. (Fig. 23 B.) Dorsal languets long and slender, one for each series of stigmata. Bndostyle ne
. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). 528 THE FUR SEALS OF THE PRIBILOF ISLANDS. £3^.. seen with difficulty. Ganglion not spherical, not large. Tentacles not numerous, apparently about twelve, presenting a peculiar distorted, shriveled appearance, situ- ated very close around the base of the siphon. (Fig. 23 A). Branchial sac consisting of about twelve series of long, narrow, regular stigmata. A well-developed muscle band in each in- terserial space. (Fig. 23 B.) Dorsal languets long and slender, one for each series of stigmata. Bndostyle nearly straight, moderate in size. Digestive tract.—(Esophagus issuing from the branchial sac at its postero-dorsal angle. Nothing characteristic in the general form and proportions of the tract as a whole. Stomach distinctly longer than broad. Folds of its wall distinct, about six extending the entire length of the organ, and in addition two or three shorter and narrower ones on one side; in some cases these strongly suggesting the areolated condition (fig. 23). Eectum terminating in a broad, trumpet-shaped anus. Sexual organs.—Ovary small, situated in the post-abdomen, a short distance behind but not in contact with the intestinal loop. Testis occupying nearly the whole of the remainder of the long post-abdomen. The numerous rather small regular lobes are distinctly visible, those of the anterior narrower portion of the post-abdomen forming a single row only in many specimens. Vas defereus conspicuous, passing to left of intestinal loop. No embryos seen. This species has much in common with A. pribilovense when the two are compared with reference to the zooids only; though from this standpoint they are rendered specifically quite distinct by differences in size, in the atrial languets, and in the folds of the stomach wall. The greatest difference between them, how- ever, as will be noticed, is in the general character of the colony. These species would appear to be somewha
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtongovtprin
