CONTENTS. ix 



The Rev. W. S. Symonds on the Physical Geology of the Bone-caves of the 

 Wye 88 



Mr. J. E. Taylob on the Occurrence of Seams of Hard Sandstone in Middle 

 Drift of East Anglia 88 



Mr. Ralph Tate on a Census of the Marine Invertebrate Fauna of the Lias 88 



]\Ir. J. Tennant on the Diamonds of South Africa 88 



Mr. James Thomson on the Occurrence of Pehbles and Boulders of Granite in 

 Schistose Rocks in Islay, Scotland S3 



Mr. Alfred R. Wallace on a Diagram of the Earth's Eccentaicity and the 

 Precession of the Equinoxes, illustrating their Relation to Geological 

 Climate and the Rate of Organic Change 89 



Professor W. C. Willlimson on the Organization of the Stems of Calamites 89 



Mr. Searles V. Wood and F. W. Harmer on the Palfeontological AsjDects 

 of the Middle Glacial Formation of the East of England, and on their 

 bearing upon the Age of the Middle Sands of Lancashire 00 



Mr. Henry Wood-ward's Notes on FossU Crustacea ^ 91 



BIOLOGY. 



Address by Prof. Rolleston, M.D., F.R.S., President of the Section 91 



Botany and Zoology. 



Colonel Sir James Alexander on the Effects of the Pollution of Rivers on 

 the Supply of Fish 100 



Prof T. C. Archer's Notes on the Changes produced in Lottts corniculatns by 

 Cultivation 109 



Mr. Edward Atkinson on the Osteology of Chlmmjdophorus truncatus .... 110 



Mr. John Barker's Notes on Pleuronema doliarium, a new Infusorium .... Ill 



Prof. Van Beneden sur les Parasites Ill 



ilr. Alfred W. Bennett on Protandiy and Protogyny in British Plants . . Ill 



Mr. Edwin Birch all on some Hybrid Sphingidse and other Lepidoptera . . Ill 



Mi\ Henry Bird on the Steypireyor Whale of the Icelanders 112 



Mr. Henry B. Brady's Notes on Brackish-water Foraminifera 11,3 



Mr. Robert 0. Cunningham on the Terrestrial and Mai-ine Fauna of the 

 Strait of Magellan and Western Patagonia 114 



Prof. Alexander Dickson's Note on the Embryo of the Date-Palm 11-5 



Dr. Anton Dohen on the Foundation of Zoological Stations 11,5 



Sir Walter Elliot on the Habits of the Indian Rock-snake [Python molurtis) 115 



Mr. Thomas Gibson on Abnormal Petals on Flowers of Ranunadus aquatilis 115 



on Parasitic Habits of PyroJa rotundifolia 116 



Col. J. A. Grant on the Vegetable Products of Central Afiica 117 



Dr. J. E. Gray's Notes on the Whalebone- Whales of the Southern Hemi- 

 sphere 117 



Dr. J. E. Gray on the Portuguese Globular Anchor-Sponge {Pheronema Grayi) 117 



Mr. Townshend M. Hall on the Abnormal Growth of Ferns 117 



Mr._ Albany H.\ncock's Note on the Larv^al State of Molgula, with Descrip- 

 tions of several new Species of simple Ascidians 118 



