128 Geological Society. 



of his published papers (twenty-four in number), special attention 

 being called to a paper on Melanism in the 'Entomologist' for 

 1887; and a list of works of reference in tbe Central Public 

 Library, Hull. The volume concludes with a complete Alphabetical 

 Index of Species. 



We have only one fault to find with the execution of this excellent 

 little book. Too much prominence is given to the term " European " 

 collection, for, as we are told on p. x, " The collection . . . consists 

 of a magnificent series of specimens obtained from almost every 

 district of the entire Palsearctic Region from Iceland to Vladi- 

 vostok." 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



November 3rd, 1909.— Prof. W. J. Sollas, LL.D., Sc.D., F.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. 'Certain Jurassic (Lias-Oolite) Strata of South Dorset, and 

 their Correlation.' By S. S. Buckman, F.G.S. 



(1) Descriptions are given of certain strata (Lower Bathonian 

 to Pliensbachian) on the Dorset coast : — Chideock and Burton 

 Bradstock. 



(2) Comparison is made with similar strata inland — with a 

 summary of beds at Stoke Knap ; with certain North Dorset strata ; 

 with Toarcian beds of Yorkshire and Northamptonshire. 



(3) The strata described are classified according to what may 

 be called the ' multizonal ' or ' polyhemeral ' system in the main, 

 according to the scheme introduced for these strata in 1893 (5) ; 

 but further divisions due to other investigators and to the Author 

 are dealt with. 



(4) The strata described are arranged among thirty-six zonal 

 (hemeral) divisions— a greater number of divisions than Oppel used 

 in 1856 for all the Jurassic rocks, of which these beds form but a 

 small part. 



(5) The Upper Lias part of the Junction-Bed of Down Cliffs, 

 Chideock (Lower or -pre-striafodiis Toarcian) is a very condensed, 

 imperfect epitome in 20 inches of about 80 feet of strata on the 

 Yorkshire coast, and of very much more, allowing for gaps. 



(6) Between the bifrons-l&jer and the striatuhis-layer of the 

 Junction-Bed there is occasionally a 2-inch layer which is all that 

 represents some 250 feet of deposit in the Cotteswolds — so that 

 about 2 feet of Junction-Bed was formed while some 550 feet were 

 being deposited elsewhere. 



