OF FOSSIL -SHELLS, See. 103- 



12. The Turbo with ventricofe fpires, called, The Trumpet-4hell . 

 (&)' Thefe two from the clay-bank at Simonhurn. . 



13. A fmall Trochas, with tranfverfe^nV, and a fharp Apex (h). 



14. A caft of the larger Trochus, with an acuminated Apex. In : 

 the fame Hone with the white Turbinites (terebra) No. 1 1. . 



15. A caft of the Trochus with anobtufe Apex.. Taken out of an ; 

 aftroite marmorite, from the more of the brook at Simonburn. 



1 6. The cylindric Nautilus, with longitudinaly?n> (i).\ 



17. KNautilites, Lapis fer pent arius, or Ammonites. Found in lim.e/~ 

 ftone at Chipchace. 



Small ftriated nautilitie, compofed of the pyrites, have been found 

 in the coal-mines near Nenvcaftle, of .which the late Dr. Cay had 

 one or two (k)., 



The' recent fhell of the cylindric nautilus is fuppofed by Lin-- 

 meus to be an inhabitant of the Baltic ocean. The wreathed nautilus, 

 or Cornu Ammonis, is a native of the Indian feas. Mariners in their 

 voyages often obferve it, who call it the Sailor, from its refem- 

 bling in its motion a fhip under fail. It is called Cornu Ammonis, 

 from its having a kind of refemblance of the wreathed horns on 

 the heads of the images of Jupiter Ammon. 



(g) Morton's Northamptonfliire. PI. 7. Fig. 18. 

 (h) Fig. 30. 



(i) Nautilus tefta re&a fubcylindracea apicem verfus anguftiore.. Linn. Faun. Suec. 

 ,p. 380. n. 1330. Rumph. Conchyl. 



.(k) Ph. Tr. No. 250. 



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