3^6 PETRIFACTIONS. 109. Helmintholithus. 



2* Elongated and more or lefs ftraight. 



a. The Nautilus Lituus. 



hi Snueden^ Normardpt Bohemia.^ ^f^fi ^c, in lintellone, 



b. The Nautilus Orthoceras. 



Helmtnth, nautili orthoc. St;/r. nat -xW, 5. p. 161. n, 2« 

 Alveolus. Scbtuch, tUlu-v. 938. Heiv. 7./", 8. 

 TuLHilus concameratus* KUtn. Tubul 7, tab, 2--8. 



Foursd folkary or aggregate, detached or fixed, in England^ 

 Frante^ S^eden^ Siberia^ Germ^fiy, Bohetma^ Sec, in limc- 

 ftone, fpar, marble, fandftone, or other mineral. 



c. The Nautilus Bcleinnita^ TbunJerhelt^ Thunder/tone. 



Helmintholithus Alcyoni* 5>y/* nat, xii, 3. ^ 170* «. 22. 



Tu'-^ulus ni£riT)US, K/ez/s. gedan., ly ^1,4. t. y, Sf g,. 



Belemrsites^ Rumpb, muj\ tab. 50. fig, I-'— 5- 



Belemnires, Breyn polytbal, i\.i, f,l.y, , 



B cicmn i tes Ge/n, /f . 9 1 . Erhart difs ^yty. ^ f U 



Very frequent in oriany parts of E»^I nd, particularly in 

 Giocffterjhirt and Ox/ord/htrey and in moft mountainous parts 

 of Europe: they are more or lefsopikeor tranfparent ftraight 

 or a little bowed, cylindrical, conic, more or lefs clavare^ 

 fufjfonn, a little compreffed, pointed or rath(^r ohtu'e, 

 with a groove or two towards the tip, internally hollow or 

 filled up, from a quarter of an inch to 8 inches long: co- 

 lour whit:(h, amber colour, grey, brownifh or bh.cicjfh: 

 they are often incloied in or adhere to other (tones, and are 

 compofed of feveral crufts cncircHng each other, and are 

 moll frequent in chalk, grave) or clay : when burnt or 

 fcraped with a knife, thev give out an odour like rafped 

 horn. The country pe pie h ve a notion that they are al- 

 to be found after a thurder-ilorm* 



Cemm Tiie Conus. 



In Piedmont, S'witzerlwid, and Tranjyhaniat moft commonly 9. 

 marble nucleus. 



Porcellatu^ The Cyprsa or Cowrie. 



* In PUdmtint and Auftria^ mtrmoreous. 



MulUics, The Bulla, 



Near Nothberg in Germany, 



