f *53 ) 



5910 A larg« and fine fpecimen of Mytilus Pliratin, S. a fre(h water ftiell, from 

 C/jina, each valve having a row of fix peails, all furnifhcd with ftalks, ex- 

 plaining an artifice made ufc of by the Chincfe, in affifting nature in the for- 

 mation of pearls, by fiflcning knobbed wires on the infide ot the Ihell, while 

 the animal was liring, which was afterwards replaced in the river, or other 

 place it was originally in, and in procefs of tinic, coated the wires over with 

 the pearly fubftance of its fliell. 



391 1 A Cluftcr of Ealanus Tulipa, E/l's. Fhilofopb. Tram. fig. lo, partly over-run by 



a Gorgonia pretiofa, 'Olty curious and rare, from Sicily 



3912 A very large and fine Afterias Caput Medufas, L. from Archangel, very rare 



3913 A capital fpecimen of Foluia Impcrialis, S. or Great horned Wild Mufic, from 



Luconia, extremely fcarce. — Martiti, vol. HI. 934, 935. 



CURIOUS ORES, CRYSTALS, &c. 



3914 A fine fpecimen of cryflallized Antimony, from Auvergne in Trance, very 



rare 



3915 Part of a Brazilian pebble Cryftal, reflefting piifmatic colours, very beautiful 



3916 A fine Marcalitical Copper Ore, richly coloured, one fide poliflied, from &)», 



rare 



3917 A Drufen of hollow pyramidal Qiiartz ; its cavernous property fuppofed to be 



owing to a decompofuion of fome calcerous fubllancc, over which it had 

 formed, from Hungary 



3918 A rich fpecimen of Native gold, in Quartz, fiom Peru 



3919 An elegant fpecimen of ftellated efflorefcence of Cobalt, of a beautiful pink 



colour, from Arineicrg, in Saxany, rare, inclofid in a neat glafscafe 



3920 A group of Quartz Cryftals, with Spiculae of black fliirl within, and a curious 



plated Iron Ore, with Terra Ponderofa, from Cornwall, both rare 



3921 A mofl beautiful and rich fpecimen of cryflallized lamellated Native Gold, with 



Lead Ore, Quartz, Cryftals, &c. from Boitza, m Tranfylvania, very rare 



3922 A very fine fpecimen of Plumofe White Vitrol of Iron, very fcarce, from 



Hungary 



Uncommon PETRIFACTIONS, SHELLS, MADRE- 

 PORES, &c. 



2923 The famous cryflallized Echinites of Mf. Baker, defcribed in the Philofophical- 



TranfaiStions, No. 482. 

 3924 A large and finely coloured fpecimen of Helix Undata, an undefcribed fpecies- 



of Land Snail, froin whence unknown. — Favanne, pi. 63, fig. G. 3. 

 392^ Avery large and fine fpecimen of a curious variety of Mudrepora Miiricata, L, 



inclofedin a glafscafe, with mahogany frame and back 

 3926 A large and fine fpecimen of Valuta Nebilis, S. an extremely rare, and very 



beautiful (hell of the Wild Mufic kind, from China.— L^Jier, 799. 6. — Mariiiz 



. ni.m. 



3927 A. 



