325 



things of that sort were introduced for the purpose of resolving difficult 

 diatoms ; but did they really do it better than anything else ? He thought 

 not. lie then drew upon the blackboard a diagram of what he styled 

 " the last thing out," explaining the advantages claimed for it, but express, 

 ing an opinion that such contrivances, so far from being advantageous, 

 merely tended to complicate and to introduce errors. He had brought for 

 exhibition two slides of Amphipleura pellucida, for exhibition in the room, 

 and though one was Van Ileurck's, placed on a Powell's instrument, with T \ 

 objective, and the other a dry mounted specimen, he ventured to say, they 

 would find that the one shown dry, with inferior apparatus, gave the better 

 effect ; both instruments being set to the best pitch of resolution. 



The President then announced the meetings, &c, for the ensuing month, 

 and the meeting concluded with the usual conversazione, at which the 

 following objects were exhibited : — 

 Spirorbis nautiloides 



Marine Mite Halacarus notops 



Vinegar Eels, alive 



Fredericella Sultana 



Argulus foliaceus from Stickleback ... 



A polariscope in which the polariser is a~ 



mirror of opal glass ... 

 Amjphipleura pellucida in Van Heurck's ^ 

 medium, -^ oil immersion objective and 

 C eye-piece x 1,200. Amphipleura I 

 pellucida, dry, J5 oil immersion objective, 

 and A eye-piece x 1,250, illustrating 

 paper re ad by him ... 

 Lophopns crystallinus and Fredericella Sultana 

 Circulation in the tail of a minnow, shown in" 



the apparatus described by him 

 Diatoms Entoyoyiia punctulata (Grev.) Cam- 

 bridge, Barbadoes 

 Membranipora, alive 



'} 



Mr. F. W. Andrew. 

 Mr. H. E. Freeman. 

 Mr. G. Hind. 

 Mr. C. Le Pelley. 

 Mr F. J. McManis. 



Mr. A. D. Michael. 



Mr. E. M. Nelson. 



J 



:} 



Mr. C. Rousselet. 

 Mr. A. W. Stokes. 



Mr. Gerald Sturt. 

 Mr. G. Western. 



Attendance — Members, 28 ; Visitors, 4. 



Journ. Q. M. C, Series II., No. 7. 



c 



