452 Mr. T. V. Wollaston on new British species of Coleoptera. EXPLANATION OF PLATES IX. and X. Plate IX. B. Fig. 1. Closterium acerosum : o o, vesicles containing granules in constant motion ; s' a" s'", minute thin cords, which I saw change in rela-tive position ; d d, glands ; m, aperture (mouth) ; r r, apertures which occur in some other species of Closteria, and from which Ehrenberg saw minute feet project. Fig. 2. Stylonychia pustulata : m, mouth ; b, contractile bladder ; /, rigid bristles, moveable upon their bases. Fig. 3. Vorticella nebulifera : b, contractile vesicle ; z, gastric cells ; s } mus-cular sheath ; m, muscle ; v v, elongations of the muscle ; /, attach-ment in the muscular sheath. Fig. 4. Paramecium stomioptycha : a a a, fibres which form a circle around the oral aperture ; z, its minute appendix ; d, gland ; s, contractile vesicle with its appendages. Fig. 5. A Vorticella : m, mouth; s, general alimentary canal (oesophagus) ; z, gastric cells ; i i, their hollow peduncles ; a, anus. Fig. 6. Epistylis grandis : m, mouth ; i i, gastric cells, which I saw filled, without having seen the nutritious matter pass the apparent extre-mity r of the oesophagus ; z, filled gastric cells in connexion with the general alimentary canal. Plate X. Fig. 7. Stentor ccerulevs : b, vesicle; Jc, germ; d, gland. Figs. 8 — 14. Stages of the development of the globular body observed in its interior. Fig. 15. Stentor polymorphus : b, contractile vesicle ; d, gland ; e, germ, as described under St. cceruleus. XL VII. — Descriptions of three newly-discovered British species of Coleoptera. By T. Vernon Wollaston, B.A., E.C.P.S. [With a Plate.] Section NECROPHAGA. Fam. MycetophagidjE, Westwood. Genus Atomaria, Kirby. 1. Atomaricu pallida. Oblonga, pubescens, corpore toto, oculis nigris antennisque testaceis exceptis, pallido-testaceo. PI. IX. fig. 1. Corp. long. lin. J. Depressed, thickly punctured, slightly shining and pubescent. The entire insect of a uniform pale tes-taceous hue, with the exception of the antennae, which are slightly darker, and the eyes which are black. Thorax broad ; antennae long and robust, the three apical joints large, forming a club, the terminal one slightly paler than the rest. Taken at Fulbourn near Cambridge. Three specimens are in my own cabinet, and one or two more in the possession of the Rev. Hamlet Clark of Northampton.
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