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PEOCEEDINGS OF THE SOCIETY. 



Meeting of 10th December, 1879, at King's College, Strand, W.C. 

 The President (Dr. Beale, F.R.S.) in the Chair. 



The Minutes of the meeting of 12th November last were read and 

 confirmed, and were signed by the President. 



The List of Donations (exclusive of exchanges) received since the 

 Lxst meeting was submitted, and the thanks of the Society given to 

 tlie donors, 



Balbiani, Prof. G. — Leyons sur la Generation des Verte'bres. From 



Eecueillies par le Dr. F. Henneguy (revue.s par le Professeur), 

 and twelve other previously published papers, including his 

 ' Rccherches sur Ics Phenomeues sexuds des Infusoires,' 1861 .. The Author. 



Gibbes, Heneage. — On the Structure of the Vertebrate Spermatozoon 

 (reprinted tiom the ' Quart. Jour. Micr. Sci.,' vol. xix.) and two 

 slides to illustrate the paper The Author. 



Thiimen, F. de. — Verzeichniss der um Bayreuth in Oberfranken 

 beobachtetcn Pilze. (8vo. Landshut, 1879), and separate 

 copies of 21 of the author's articles, and list of his publica- 

 tions The Author. 



Warming, Dr. E. — Om nogle ved Danmarks Kyster levende 



Bakterier. 116 pp., 4 plates. (8vo. Copenhagen, 1876) .. The Author. 



„ „ Ue 1 Ovule. 190 pp., 7 plates, and three 



other previously published papers Ditto. 



Weismanu, Prof. Dr. A. — Beitrage zur Naturgeschichte der Daph- 

 noiden. Parts I.-VII. 4S6 i)p., 15 plates. (8vo. Leipzig, 



1876-9) The Author. 



,, „ Das Thierleben im Bodensee. 31 pp., 

 1 plate. (8vo. Lindau, 1877) Ditto. 



Cabinet for the old Microscopes of the Society 3L-. Crisp. 



A special vote of thanks to Mr. Crisp, for the Cabinet, was carried 

 by acclamation. 



Mr. West described a form of tilting and rotating slide, which he 

 exhibited to the Meeting, designed so that the object was placed in the 

 centre of a sjiherc, and remained in the centre of the field and unchanged 

 as to focus, in whatever direction the bed of the slide was moved. 



Mr. Crisp read some announcements of forthcoming optical 

 novelties from America, including a new Binocular Microscope and 

 a " globe lens," by Mr. Gundlach. 



Mr. G. J. Hinde, in exhibiting jaws of Annelidcs and Conodonts, said 

 that up to within a recent date the knowledge of the Aimelide jaws had 

 been confined to that of their markings, but lately the hard parts of the 

 jaws had been discovered in a fossil state, botli in this couutry and ahso 

 in America. They reseniblecl closely the jaws of existing Aunelides, 

 but their form was extremely variable ; there could be no doubt that 

 tliey were really what they wore called. The Conodonts wore found 



