. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). TUNICATA OF THE PEIBILOF ISLANDS. 531 At least 17 series of stigmata, the individual stigmata exceedingly small and obscure, though the series fairly well marked by the heavy muscle band in each inter- stigmatic space. This muscle band as broad as, or broader than, the stigmatic area (flg. 28, m. c. V). Bndostyle broad, not greatly tortuous. No information concerning the dorsal languets. Digestive apparatus.—Loop rather wide, not twisted, particularly characterized by the great thickness of the rectal li
. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). TUNICATA OF THE PEIBILOF ISLANDS. 531 At least 17 series of stigmata, the individual stigmata exceedingly small and obscure, though the series fairly well marked by the heavy muscle band in each inter- stigmatic space. This muscle band as broad as, or broader than, the stigmatic area (flg. 28, m. c. V). Bndostyle broad, not greatly tortuous. No information concerning the dorsal languets. Digestive apparatus.—Loop rather wide, not twisted, particularly characterized by the great thickness of the rectal limb. OEsophagus exceptionally broad, particularly at its mouth; much narrower at its entrance into the stomach. Stomach apparently nearly spherical in its normal form, but usually broader than long in preserved specimens. Its entire wall covered with small, rather uniform, thickened patches or areolations (flg. 28). Length of the loop behind the stomach considerably greater than cambined length of oesophagus and stomach. Eectal portion of intestine greatly enlarged in most specimens. It reaches the dorsal side of the branchial sac by turning at a short angle immediately behind the sac. Reproductive organs,—Situated in the long,"broad post-abdomen. Ovary in the form of a long, narrow band placed at one side of the post-abdomeu (fig. 28, ov.), the ova distinctly amoeboid, and without recognizable follicular epithelium or "test" cells. No oviduct observed. Testis distinguished with difficulty (excepting when containing ripe sperm) from the great mass of mesenchymatous jj j material by which the post-abdomen is filled. Vas deferens not seen. Embryos develop in packages in cavities of the test (fig. 27). No bud- ding seen. (See end of paper for account of sexual reproduction of this species.) This species is certainly closely related to S. turgens Phipps, and at first I was much inclined to consider it to be identical with that spe- cies. There seem, however, to be
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