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. 



