. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). ASCARIS UECIPIENS. Ill. Krabbe was not able to definitely determine whether or not this form was identical with A. maritima, but Leuckart, who examined A. decipiens at Krabbe's request, stated that it was specifically distinct from A. maritima. The two forms belong to the same group, but there seems to be no evidence in support of the view that A. maritima of man occurs in seals. Cobb (1888, pp. 59-64) described as a new species A. ftwZ&osa,. some nematodes taken by Kiikenthal from the stomach of Pho
. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). ASCARIS UECIPIENS. Ill. Krabbe was not able to definitely determine whether or not this form was identical with A. maritima, but Leuckart, who examined A. decipiens at Krabbe's request, stated that it was specifically distinct from A. maritima. The two forms belong to the same group, but there seems to be no evidence in support of the view that A. maritima of man occurs in seals. Cobb (1888, pp. 59-64) described as a new species A. ftwZ&osa,. some nematodes taken by Kiikenthal from the stomach of Phoca iarhata (=Erignathus barbatus); although certain important details of structure are omitted in Cobb's article, there can be scarcely any doubt regard- ing the specific identity of his form with A. decipiens, as is shown by the following abstract of Cobb's work: The male (figs. 3, 4) measures 50 to 70'"™ long, with cylindrical body attenuated anteriorly; the head is about ™™ broad, while the breadth of the body is one-twenty- ''''' fifth to one-twenty-sixth of its length. The transverse striae can be seen only with the aid of the microscope. The tail is curved and possesses papillae (fig. 4) which can be distinguished with the hand lens. Cobb's figure shows 7 pairs of postanal papillae; 1, 2, and 3 nearer the tip, 4, 5+6, and 7 nearer the cloaca; praeanal papillae about 60 in number on each side, extending for- ward in two irregular rows; in the figure the first five praeanal papillae are smaller than those which follow; the spicules measure 2 to '"'" long, are nearly similar, but the left spicule ('"™) is slightly longer than the right ( ™™). The female measures 50 to SO"™, the vulva is situated somewhat more than one-third the length of the body from the anterior extremity. The ™™ long oesophagus is composed of three portions: an anterior portion 2*"™ long by ™™ in diameter (broad- est portion); a seco
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