( 858 ) 

 PKOCEEDINGS OF THE SOCIETY. 



The first Conversazione of the Session was held on the 24th November, 

 1886. 



The following objects, &e., were exhibited : — 

 Mr. J. Badcock : 



Lophoptis cristallinus. 

 Mr. C.Baker: 



(1) New Apoehromatic Objectives and Compensating Eye-pieces by 

 Zeiss. (2) Specimens of Bacteria. (3) Diatoms in Cassia Oil. 

 Messrs. E. and J. Beck : 



(1) Petrological Star Microscope. (2) Bacillus of Leprosy. (3) Mem- 

 brana Euyschiana. 

 Mr. T.Bolton: 



Eurycercus lamellatus. 

 Mr. Crisp: 



Zeiss's 1/8 in. Apoehromatic Homogeneous-immersion Objective. 

 Dr. Crookshank : 



(1) Photomicrographs of Bacteria. (2) Trichomonas Leioisii from 

 Sewer-rats. 

 Mr. H. Crouch : 



Grand Model Microscope. 

 Mr. T. Curties : 



Generative Organs of Insects, dissected by Mr. Tatem. 

 Mr. F. Enock : 



Head of Ground Bee, Colletes Baviesana. Battledore-wing Fly, Mymar 

 pulchellus. Fairy Flies, Aclayrus incarnatus. 

 Mr. F. Fitch : 



Mouth structure of Fly (Dexia) and Ticks {Ixodes) from Madagascar. 

 Dr. Heneage Gibbes : 

 Photomicrographs. 

 Mr. H. F. Hailes : 



Abnormal forms of Peneroplis. 

 Mr. J. D. Hardy : 



Pond Life (various). 

 Dr. E. G. Hebb : 



Actinomyces (Human) from Capillary of Liver. 

 Mr. S. J. Mclntire : 



(1) Pollen of Victoria Begia. (2) Seeds of Pistia stratiotes. 

 Mr. A. D. Michael : 



Aglaophenia pluma (stained). 

 Mr. E. M. Nelson : 



Amphipleura pellucida in Prof. H. Smith's medium, ref . index 2 • 4 ; 

 oblique illumination by Powell's achromatic oil-immersion con- 

 denser ; Powell's Oil-immersion Objective 1/12 in, N.A. 1*43 and 

 1/4 in. Huyghenian eye-piece, giving an amplification of 4400 dia- 

 meters (equal to 36 times the initial power of the lens). 

 Messrs. Powell and Lealand : 



(1) Amphipleura pellucida with 1/12 in. apoehromatic homogeneous- 

 immersion objective 1-40 N.A. and achromatic oil-immersion con- 

 denser. (2) Scale of Podura (^Lepidocyrtus curvicollis) with 1/12 in. 

 apoehromatic homogeneous-immersion objective 1" 40 N.A. and achro- 

 matic condenser. 



