. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. OTHONIA. 275 rowed posteriorly, of a reddish or yellowish-brown colour, stained with the contents of the intestine, annulate; the rings thirteen in number, smooth, furnished on each side with a small fascicle of No. XLVI,—Oihonia a. A tuft of Laurentia pinnatifida, with the animal intermixed, natural size. b. Worm removed from the tube, natural size. c. The same magnified. d. Head protruded from the tube, with tentacles displayed, as seen through the magnifier. e. The same more highly
. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. OTHONIA. 275 rowed posteriorly, of a reddish or yellowish-brown colour, stained with the contents of the intestine, annulate; the rings thirteen in number, smooth, furnished on each side with a small fascicle of No. XLVI,—Oihonia a. A tuft of Laurentia pinnatifida, with the animal intermixed, natural size. b. Worm removed from the tube, natural size. c. The same magnified. d. Head protruded from the tube, with tentacles displayed, as seen through the magnifier. e. The same more highly magnified. retractile bristles, which can be pointed either forwards or backwards ; the terminal segment semioval, obtuse, marked on each side with a distinct black speck; bristles bent, and somewhat thickened about the middle, whence they taper to a very sharp point; first two seg- ments rather narrower than the following; the anterior with a pro- jectile semioval process on the dorsal aspect, and marked with two round black eyes 1 placed towards the sides; branchial tentacula one-third the length of the body, straw-colour, unspotted, in two dense tufts originating in the sides of the head, each tuft consisting of three main stalks, which are ciUated with numerous filiform straight filaments, serrulate with very short processes on their inner aspects; mouth between the tufts; intestine straight, nearly equal throughout; the anus terminal; space between the intestine and sides mottled, transparent. Obs. This, although not hitherto enumerated among our natives, is certainly the most common species of its family on our coast. It lives in a narrow cylindrical tube, about twice its own length, placed in T 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). Dept. of Zoology; Joh
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectworms, bookyear1865
