QUEKETT MICKOSCOPICAL CLUB. 273 



employment. A good black-and-white drawing is always to be 

 preferred to a poor coloured one. He found coloured indelible 

 inks whicb may be diluted to the required depth with distilled 

 water very serviceable, but he was unable to say whether they 

 were absolutely permanent. Mr. Soar said that he used Gillott's 

 fine pens and preferred Bristol board to drawing paper. The 

 meeting closed with a hearty vote of thanks to Mr. Soar for his 

 helpful address. A series of drawings and lantern slides were 

 exhibited showing the methods used from the first outline pro- 

 duced to the finished drawing. Several very beautiful coloured 

 drawings were also exhibited. 



At the 562nd Ordinary Meeting of the Club, held on June 14th 

 the President, Dr. A. B. Eendle, M.A., F.R.S., in the chair, the 

 minutes of the meeting held on May 10th were read and confirmed. 



Messrs. Arthur Reginald Closh and George Craven Pollard 

 were balloted for and duly elected members of the Club. Three 

 nominations were read for the first time. 



xl list of additions to the Library was read. The Secretary 

 said that he had not yet finished sorting out the deep-sea dredgings 

 that had been presented to the Club, but that he would like to 

 know which members would like samples by the next Gossip 

 Meeting on June 28th. The Secretary read a note from Mr. E. M. 

 Nelson advocating the use of golden syrup as an immersion medium 

 for condensers when the thinness of the slip made it a difficult 

 matter to keep perfect contact with oil. Commander Ainslie 

 said that he overcame the difficulty either by unscrewing the 

 front lens of the condenser or by using a convex lens under the 

 condenser, and that he often used water as an immersion medium. 

 Mr. Merlin exhibited a photograph of Amphipleura fellucida in 

 " pearls " taken with direct light and using syrup for immersing 

 the condenser. The Secretary read some " Notes on Parasitic 

 Acari " by Mr. Stanley Hirst. The first note described systems 

 of tracheal tubes observed in members of the families Sarcoptidae 

 and Listrophoridae, which are generally supposed to be destitute 

 of stigmata and tracheal tubes. The second note described the 

 two valid species of Psoroptes, P. natalensis and P. communis. 

 Mr. Hirst said that although he had examined a large series of 

 Psoroptes from various domestic animals, it seemed certain that 

 with the exception of P. natalensis they must be regarded as 



