The last three, together with the present English list, represent a set equivalent to one of the earlier lists, the faster pace of new discoveries dictating the division into smaller regional lists. An occurrence qualifies for inclusion in this English list only if it is both the first in the British Isles and from an English locality, although the practice of mentioning, where appropriate, additional finds in whatever region has been continued.To keep the supplementary lists realistically brief, none of them routinely includes corrections of or deletions from Greg and Lettsom's Manual (1858), nor new and perhaps more significant occurrences of species already on record. (A mineral should not normally appear in more than one list.) Nevertheless, the lists are useful in bringing together a great deal of scattered infor-

The rare iron-tin hydroxide minerals natanite and jeanbandyite occur as small pseudo-octahedral crystals in high-tcmperature Sn-Cu-As vcins at Penberthy Croft Mine and Hingston Downs Quail)', Cornwall. The lattice paramctcrs for jeanbandyite and natanite are reported and compared to previously calculated values. Thc chemical composition of jcanbandyite is discusscd and a significant proportion of divalent Fe and Mn is shown to be prcscnt.

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Four polymorphs of Zn(OH)2 have now been recorded from an oxidised vein exposure near Milltown, Ashover, Derbyshire; sweetite, wfilfingite, ~,-Zn(OH)2, and ashoverite. The last is a new mineral, a tetragonal modification of Zn(OH)2 containing minor quantities of Pb, Cd and Ca. Its unit cell dimensions are a 6.825 (2)