. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. CAMPONTIA. 277. inarticulate, setaceous, originating in the front margin. Mouth with a pair of exsertile, corneous, brown, hooked mandibles, which, when in motion, it is seen incessantly to protrude and retract; no pro- boscis. On the front and ventral margin of the first segment are two short unjointed legs, armed with a circle of retractile claws; and the last segment is furnished, near its termination, with two similar legs : the other segments are footless and naked; but a few hairs terminate
. A catalogue of the British non-parasitical worms in the collection of the British Museum. Worms. CAMPONTIA. 277. inarticulate, setaceous, originating in the front margin. Mouth with a pair of exsertile, corneous, brown, hooked mandibles, which, when in motion, it is seen incessantly to protrude and retract; no pro- boscis. On the front and ventral margin of the first segment are two short unjointed legs, armed with a circle of retractile claws; and the last segment is furnished, near its termination, with two similar legs : the other segments are footless and naked; but a few hairs terminate the anal segment. No. XLVII. which is very slightly lobate. Anus round, Campontia eruciformis. simple, small. This animal lives among Confervse, in pools left by the tide; and is very common in Ber- wick Bay. It moves with considerable quick- ness by means of its mandibles and legs; for the former seem to be as subservient to pro- gressive motion as the latter; and, during its progress, the upper lip is considerably pro- truded, as shown in No. XLVII. e. Within the first segment we observe a heart-shaped lobated organ, which, although colourless and almost transparent, is undoubtedly the sto- mach. The very short gullet enters it above; and from its inferior end a small intestine pro- ceeds, which suddenly enlarges at the com- mencement of the fourth ring, and continues of the same calibre to its termination at the anus. This large intestine is always filled with earthy feculent matter, except that por- tion of it which traverses the last three seg- ments, and which is usually empty. Two slender thread-like vessels are to be traced winding down the sides in the space between the skin and intestine; these occasionally anastomose by still slenderer transverse branches; but I could not discover any common centre of departure. At the end of the ninth ring there are four filiform, dark-coloured, tubular organs, which seem to originate in the sides of the intestine: they traverse th
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectworms, bookyear1865
