GRAVESEND. 427 



as it would. The pieces were commonly oblong, and at 

 the same time full of lumps and irregularities. They 

 also frequently resembled fingers, feet, pegs, human 

 bodies, part of a hand, a goat's-horn, a small calf-horn, 

 etc. Inside they were commonly black, but also fre- 

 quently more or less full of lighter spots. 



The Heterogenea and foreign or less common things, 

 which are found in these chalk pits, either in the chalk 

 or the flints are in particular these : — 



1. Stralflinta, as I call a kind of stone which lies 

 like a sponge upon the flint, is broad and flat, consists 

 of parallel threads hard-petrified, which run perpendicu- 

 larly to its fiat side, exactly like the Amiant-like 

 Stralgips, [fibrous gypsum] in Prof. Wallerius's Mineral- 

 ogia* p. 55, only that this is somewhat denser. In colour 

 it is white or light grey. Still it is a kind of flint, because 

 it strikes fire with steel. It lies not only in the flint, but 

 also sometimes in the chalk.f 



2. Musselskal, Bivalve shells, occur firmly fixed in 

 corresponding cavities in the flint, as well as in the 

 chalk. 



3. Crystaller, Crystals. Often when one breaks a 

 flint to pieces, there are found inside small rock crystals, 

 barg crystaller [T. II. p. 76] closely packed. There 

 is generally an empty space left with them. 



4. Klotrunda flintbitar, or the so-called chalk- 

 eggs. These are frequently found firmly united to the 

 flint. Externally such a chalk, or, more strictly, flint- 

 egg, is covered with a white chalky crust of the thickness 



* Wallerius (Johann Gottschalk). Mineralogia. Eller Mineral Ricket 

 indelt och beskrifvit af J. G. W. Stockholm, 1747, 8vo. The first of a long 

 series of Mineralogies. (J. L.] 



f Stralflinta. Thin plates or scales of fish exhibiting a transverse fibrous 

 structure are common, especially in fragments, in the upper chalk, and in the 

 flints. U- L.] 



