CONTENTS. 





MEMOIRS. 



I. The Pennatulaceae of the Cape of Good Hope and Natal. By 

 J. Stuart Thomson, Ph.D., F.L.S., F.R.S.E. With 

 2 Plates. ... ... ... ... ... ... pp. i — 26 



{Issued separately, J anuary igtli, IQIJ.) 



II. Graphical Determination of the Stresses in the Main Spars of 

 Monoplanes. By Cecil H. Lander, M.Sc., A.M.Inst. 

 C.E. With 9 Figs. ... ... ... ... ... pp. 1 — 15 



{Issued separately, January 20th, igij) 



III. Studies in the Morphology of Isoetes. I. The General Mor- 

 phology of the Stock of Isoetes lacustris. By Professor 

 Wi lli am H. Lang, M. B. , D. Sc. , F. R. S. With 6 Text-figs. 



{Issued separately, February 6lh, IQ15.) pp. I — 2o 



IV. Variation in a Carboniferous Brachiopod — Reticularia lineata 

 (Martin), ty Henry Day, B.Sc. With 1 PL and 7 

 Text-figs. pp. 1 — 18 



{Issued separately, February nth, IQIJ.) 



V. Note on Foggy Days in Manchester. By William C. 



Jenkins, F.R.A.S. With 1 Text-fig pp. 1 — 4 



{Issued separately, March qth, 1915.) 



VI. Note on the Monthly Variation of Sunshine. By Professor 

 W. W. Hai.dane Gee, B.Sc, M.Sc. Tech. With s Text- 

 figs PP- 1—4 



{Issued separately, March 15th, i<?/5) 



