Geometrical 
angular 
mundics. 
140 NATURAL HISTORY 
lifts ; brafs-coloured ; fungoeid. There is a fungoeid in ftone, in 
Lhuyd’s Lithophylacium, N°. 122, very like this fpecimen ; of 
which he alfo gives an Icon. He calls it columellus f ungum 
Niloticum Clufii , nonnihtl refer ens , ex lapicidina Cowleiana : Thele 
are all the <pv)o£i$ mundics I have met with. 
Fig. XXXIV. Mundic ftillatitious, in perpendicular, capillary tubes, 
both furface and texture fmooth, of a cinereous lead-colour. 
XXXV. A cinereous, ftillatitious, tubulary mundic, the pipes of 
different diameter and lengths, and in regard to one another parallel 
as the pipes of an organ. 
xxxvi. On the furface, thin wedges, acuminated, as if fmall bits 
of a knife or fword, not parallel, but with their edges turned up- 
wards, ftanding out of the bed. 
xxxvii. Afhoot of mundic, columnar, the bafe at f a rhombus, 
but at g the fide angles are planed off, fo as to make the column 
there hexagonal. Of plate-mundic. 
xxxviii. A rhombo-columnar clump of plate-mundic. The co- 
lumns make different angles at their infertion ; the bafe a rhombus, 
which in one place has its ridge planed of, as at g, in the fore- 
going figure. 
xxxix. A rhomboidal fingle die of mundic, pale brafs-coloured. 
xl. A clump of intimately connected cubical mundic, polifhed, 
brafs-coloured. 
xli. Two cubes of mundic infer ted in each other’s fubftance, 
therefore fhot at the lame time, but by forces differently directed. 
N. B. Where equally immerfed, and of equal dimenfions, the 
forces and materials were equal. 
xlii. A perfect cube of mundic, of burnifhed brals-colour. 
xliii. A polyhedron ; its furface confifting of thirteen pentago- 
nal planes. 
xliv. The furface is divided into twenty triangular planes, five 
of which make a pentahedral cufpis at one end, and five make the 
like cufpis at the oppofite extremity, the other ten triangles corn- 
pleat the fpace or fillet betwixt the two cufpides ; a moft remarka- 
ble polyhedron this, and perhaps as curious a difpofition of triangles 
as is any where to be met with. Brafs-coloured. 
xlv . A bunch of mundic rhombus’s with their points planed off. 
xlvi. Another view of the fame fubject, Ihewing the front of 
the chief rhombus, as a. 
xlvii. An exact equilateral triangular fide of a mundic pyramid 
with a fmall one of the like figure on each fide, in different 
directions. 
xlviii. One grain of mundic ; its fides and ends cut in the feg- 
ment of a circle, and convex in the front, b . 
Fig. 
