1912. Irish Societies. 117 



spreading on the Cineraria by spraying the leaves with rose-red sohition 

 of potassium permanganate, and that if this remedy be apphed as soon 

 as any sign of the fungus appears, httle damage may be feared. 



W. F. GuNN exhibited sUdes of Hydra fusca and Volvox glohator with 

 what is termed the " two colour " method of illumination. This is a 

 modification of the well-known dark-ground illumination, but instead of 

 entirely stopping out the central rays of the cone of light, a coloured 

 disc of gelatine or other transparent substance is centred below the substage 

 condenser, producing a back-ground of any colour suited to the object. 

 Around this disc is placed a circle of another colour, and when the con - 

 denser is adjusted to the proper position, the object is brilliantly illuminated 

 with the converging outer rays of one colour upon a background of another 

 contrasting or harmonising colour. With suitable objects the effect is 

 very fine and details of structure are accentuated. It will be seen that 

 many variations of background and illumination can be employed, the 

 only limiting circumstance being the variety of circles and discs 

 available. With some objects a third colour can be obtained by throwing 

 coloured rays from a bull's-eye condenser. The denser portions of the 

 object will then reflect these, while the more transparent portions will 

 be unaffected and will appear coloured with the peripheral rays from 

 the substage condenser only. 



April 10. — The Club met at Leinster House, A. R. Nichols, m.a. 

 (President), in the chair. 



Prof. G. H. Carpenter showed Chernes nodosus (Schr.), a " false 

 Scorpion " new to the Irish fauna. The specimen taken at Down- 

 patrick, had been received from Mr. R. Patterson. In his Synopsis of 

 the British and Irish species of this order, Mr. H. Wallis Kew {Proc. 

 R. I.Acad., xxix. b, 191 i), states that C. nodosus is widely distributed 

 and common in Britain and expresses the opinion that it will also be 

 found abundantly in Ireland. The specimens shown had been found 

 attached to the legs of flies, 



R, Southern exhibited a specimen of Priapulus caudatus. Lam., 

 obtained by digging in the sand of a Zostera bed in Lough Swilly. The 

 chief features of external anatomy were demonstrated and its remarkable 

 bipolar distribution discussed. 



BELFAST NATURALISTS' FIELD CLUB. 



April 16. — Annual Meeting. — The President (Robert J. Welch, 

 M.R.I.A.) occupied the chair. A. W. Stelfox, Hon. Secretary, read the 

 annual report, which contained the following ; — " Your Committee have 

 pleasure in submitting the forty-ninth annual report. The work 

 accomplished during the past year will be found to compare favourably 

 with that done in former years, yet some branches of natural history 

 remain untouched in our district. In order that the services of fresh 

 workers may be enlisted your Committee have established a junior section, 

 from which it is hoped that many field naturalists may arise in the future. 

 During the year 36 new members were elected, of whom only 27 have 



