Of OXFO% ( D^SHI%E. id? 



it to be Lapis fui generis, and not to have been molded by a filia- 

 ted Cockd-flell. 



78. Befide Cockle and Efcallcp-flohes, there are others that 

 feem to be of the Oyjler kind, found plentifully in the Gravel- 

 pits without St. Clements, in Cowley -common, and in a wood near 

 Wood-eaton 1 amongft them there are fome of an oblongfigure, ve- 

 ry thick, and of a bluiiTi colour, fuchas that depi&ed Fig. 1 8. 

 which I guefs may be the fame with the petrified Co'ncha oblonga 

 craffa, mentioned by Dr. M'erret \ found in Wofcefter-flnre, and 

 there called Crow-jlones, Crow-cups, or Egg^fiones ; or elfe the 

 more protuberant part of the Mytulus niger of Aldrovandu* r , of 

 the Mytulws of Rondeletiut \ 



79. But others are again of the true Oyjler jhape, called ft r as- 

 cites, or XiSorpeou, reprefented Fig. 19. fome whereof are blue, 

 and others reddijh, of the colour of the Gravel out of which 

 they are taken : Thefe are generally greater, thicker and weigh- 

 tier, than the true Oyfter-fbell, yet like them feem to be refolved, 

 according to the opinion of Sterio \ ihtd many little, fljells, the 

 innermoft being always the greateft, and the outermoft the leas! ' 

 UpOn which very account I could eafily have aflented, that thefe, 

 and the former, might once indeed have been jhell fijh ; but that 

 we only find (juftas m the Efcall'ops') the protuberant parts of the 



fiells, and never any of the flat ones ; which had they been once 

 fifhes, we have little reafon to think, could have been thus abfent 

 from them. 



80. We find alfo in Oxford-Jhire a fort of Mytuloides , of 

 Mufcle-ftones, of an odd kind of figure, and not eafie perhaps to* 

 be parallel'd, though the teftacebws Kingdom be of large extent i 

 They are -not hollow, but within a terra lapidbfa of a yellowifh 

 colour, and cover'd without with a white (Lining kind of Arma- 

 ture, with oblong linedtions agreeable to the figure of the ftbne, as 

 in Tab. 5. Fig. i. found in digging a Well in thd Parifh of Cley-> 

 don. To which we may add another fort remarkably fmall, found 

 InHeddingtoh Quarries, Fig. 2. which finifti my difcOurfe cOrM 

 cerningfuch/W.yas fefemble the cre^tp^^, or teslaceous Jbtll- 

 fijh. Whence I proceed 



81. To slones reprefentirig the ^.xd^t^] Or the fiell-fift) of 



i Pmax return tfatur. Srie. p. ai<J, r p e Teftaceis, lib. 3. c ap> 71- f De Tejtacm,li. 1. cap 46. * In 



Trodromi verf. Ai^lp- 75,76. 



O ihS 



