CONTENTS. 



rAOE 



1. Address. By the President, J. Gwnsr Jeffreys, LL.D., 



F.R.S., P.L.S., F.G.S., etc. 1 



2. Animals which have become Extinct in Britain within 



Historic Times. By J. E. Haeting, F.L.S., E.Z.S.. . 5 



3. Our British Beetles ; Notes on their Classification and 



Collection. By Arthur Cottam, F.B.A.S 25 



4. General Observations on Spiders. By F. M. Campbell, 



F.L.S., F.Z.S., F.B.M.S 37 



0. Homology and Analogy of Plant Organs. By the Rev. 



George Henslow, M.A., F.L.S., F.G.S 49 



6. I^otes on Birds observed in 1879. By John E. LiTTLEBor 70 



7. On the Occurrence of Vertigo Moulinsiana, Dupuy, in 



Hertfordshire. By Henry Groves. (With a Plate.) 81 



8. Note on the Pupation of the Stag-Beetle. By Arthur 



CoTTAM, F.R.A.S 83 



9. Anniversary Address. By the President, J. Gwyn 



Jeffreys, LL.D., F.B.S., F.L.S., F.G.S., etc 85 



10. Notes on Sponges, Recent and Fossil. By Henry 



GiLBERTSON 97 



11. The Post-Tertiary Deposits of Hertfordshire. By J. 



YiNCENT Elsden, B.Sc, F.C.S. (Illustrated.) . . . . 103 



12. Observations on Rotifers, with special reference to those 



found in the Neighbourhood of Hertford. By F. W. 

 Phillips. (With a Plate.) 113 



13. Meteorological Observations taken at Wansford House, 



Watford, during the year 1879. By John Hopkinson, 

 F.L.S., F.M.S., etc., Hon. Sec 121 



14. Report on the Rainfall in Hertfordshire in 1879. By 



John Hopkinson. (With a j\Iap of Hertfordshire.) . . 127 



15. Report on Phenological Observations in Hertfordshire in 



1879. By John Hopkinson 133 



