Reports & Proceedings — Geological Society of London. 377 



XII. — Iron-oee Occukeences in Canada. Vol. II. By E. Lindeman 

 and L. L. Bolton. Canada, Department of Mines, pp. 222 and 

 33 maps. Ottawa, 1917. 

 rilHE first volume of this publication has already been noticed in 

 JL these pages; the second volume contains detailed descriptions 

 of all the known occurrences of iron-ores within the Dominion. 

 These include almost every known variety of ore, but the great 

 majority of them seem likely to be of small commercial importance, 

 at least under the present economic conditions. 



XIII. — Special Beports on the Mineral Besodrces of Great 

 Britain. Vol. Ill : Gypsum and Anhydrite, Celestine and 

 Strontianite. Second edition. By R. L. Sherlock and B. 

 Smith, pp. iv + 64. 1918. Price 2s. 



THE second edition of this memoir is in the main a reprint of the 

 first edition, but some further particulars have been given of 

 deposits of gypsum in Nottinghamshire and Somerset, together with 

 estimates of the reserves of gypsum still available in diff'erent 

 districts. 



I. — Geological Society of London. 



1. May 15, 1918.— G. W. Lamplugh, F.B.S., President, in the Chair. 

 A lecture on "The Geology of the Italian Eront" Avas delivered 



by Professor E. J. Garwood, M.A., Sc.D., F.R.S. The lecture was 

 illustrated by lantern-slides, geological maps and sections, and tables 

 of strata. 



The President expressed to the Lecturer the thanks of the 

 Eellows present. 



2. June 5, 1918.— G. AV. Lamplugh, F.R.S., President, in the Chair. 

 (1) "The Kelestominse, a Sub-Earailv of Cretaceous Cribi'imorph 



Polyzoa." By William Dickson Lang, M.A., F.G.S. 



The KelestominaB are a sub-family of Pelmatoporidse. The latter 

 are a family of Cretaceous cribrimorph Polyzoa, whose costse are 

 prolonged upwards as hollow spines from the median area of fusion 

 of the intraterminal front-wall. The broken ends of these spines 

 form a row of pelmata (or, if small, pelraatidia) on the intraterminal 

 front-wall. 



The Kelestominse are Pelmatoporidse with an apertural bar each 

 half of which is bifid ; and the proximal and distal forks of each half 

 are fused with the corresponding forks of the other half. The fused 

 distal forks are also fused with the proximal pair of apertural spines, 

 Avhich are greatly enlarged. 



The simplest known form of this arrangement is seen in the genus 

 lieIesto7na, Marsson. Kelestoma is characterized among the Keles- 

 tominas by its great oecial length, and hj the great number of costa?. 

 Kelestoma has the following three species, which form a single 



