86 



Trichoniscus pusillus 

 „ pygmaeus 

 ,, Stebbingi 



Haplophthalmus Mengii 



Oniscidae. . 



Platyarthrus Hoffmannseggii 

 Oniscus asellus 

 Philoscia muscorum 

 ,, Couchii 



Porcellio scaber 



,, dilatatus 



,, pictus 

 Metoponorthus pruinosus ... 

 „ cingendus ... 



Arm adillidiida e . 



Armadillidium vulgare 

 ,, nasatum 

 ,, pulchellum ... 



Common almost everywhere. 

 Swanage. 



Greenhouse, Bournemouth. 

 Holdenhurst, Swanage, etc. 

 Bournemouth. 



Greenhouses, 



Frequent in ants' nests throughout the district. 

 Common almost everywhere. 

 Common under bark and among moss. 

 Freshwater Bay (identified by Dr. W. T. 



Caiman). 

 Common almost everywhere. 

 Greenhouses, Bournemouth. 

 Swanage. 



Common in hot, damp situations. 

 Freshwater (identified by Kev. T. K. K. 

 Stebbing, F.R.S.). 



Common almost everywhere. 

 Greenhouses, Bournemouth. 

 Yarmouth, I. W. 



Note. — The two species, Philoscia Couchii and Metoponorthus cingendus, belong 

 to the West Coast Group and have not been previously recorded east of 

 Devonshire. 



LIME. 



A series of papers dealing with the Compounds of Calcium in their 

 Chemical, Geological, Geographical, Botanical, and Utilitarian 



aspects. 

 I. 



Lime and other compounds of Calcium, considered from 

 the standpoint of Chemistry and Physics.. 



By Hubert Painter, B.Sc, F.C.S. 



(Read before the Physical Section, January 9th, 1915.) 



T HOLD in my hand a natural crystal of Iceland Spar. This 

 is the purest form of a chemical compound which occurs in 

 enormous quantities in the earth's crust. Marble, chalk and the 

 various limestones are, as regards chemical composition, one and 

 the same substance with the specimen I hold up before you. They 

 differ, of course, from this and from each other, in various 

 respects, in hardness, in mechanical structure, and, more im- 

 portant still, in history. The manner in which the great deposits 

 of limestone, chalk, etc., have been formed it is no part of my 

 present purpose to expound ; these and cognate matters will be 

 more appropriately dealt with in subsequent lectures to be given 

 in other sections. We are at present concerned with the unity of 



