J923 



CHROXOLOGY 



35 



Ages HemercB 



6. cymodoce 



Strata 



5. u rale n sis 



35. Market Rasen Beds 



36. Ringstead 25 



4. Amoeboceras 37. Loth Beds, Sutherland 

 cf. crickijovale 



3. circumplicatus 38. Allt na Cuille, Suther- 

 land, Rhynchonella 

 sandstones 



2. RasenicB 

 I. &rt3'/t:/ 



Prionodocerat an 

 4. super stes 



39. Allt na Cuille CUff Beds, 



sandstones 



40. \\'otton Basset Beds, 



Wilts 



41. Brill Serpulite Bed, 

 Bucks 



3. prionodes 42. Ickford Clays 



2. dichotomum 43. Shotover Clay, Dichoto- 



nwceras dichotomum, 

 T.A. CXXXIX 



1. Dichotomoceras 44. X. Ferriby, boring 



sp. 

 Ringsteadian 



3. marstonensis 45. Sandsfoot 17 (younger 



than Ringstead 17, 

 H.S.) 



2. brandesi 46. Ringstead 17 



I. pseudocordatus 47. W'estbury, \Mlts, Iron- 

 ore 



5owt; equivalents 

 Borings (J. P.) ; Scot- 

 land, Loth, Wester 

 Garty, Kintradwell; 

 Portugal, Couches de 

 Montejunto 



Dorset, Abbotsbury Iron- 

 ore ; Ringstead 27 ; 

 Scotland, Ethie, Kin- 

 tradwell ; Boulogne, 

 Kim. g ; Havre 



Sandsfoot 22, up. p. (H.S.) 

 Abbotsbury Iron- 



ore (H.S.) ; Scotland, 

 Portgower, Xavidale, 

 Helmsdale ; Russia 



Sandsfoot 22, lower part 

 (H.S.) ; Kintradwell 



Abbotsbur}' Iron-ore, 

 lower beds ; Scotland, 

 Loth Point, Loth (in 

 clavs) ; Wurtemberg, 

 W.J. ^ 



Ringstead 19 ; Swindon 

 (H.S.) ; Scotland, Allt 

 na Cuille Chff Beds ; 

 Port an Righ ; France, 

 Havre 



Ickford, Bucks, Serpuhte 

 Bed ; Minet\-, Wihs ; 

 Scotland, Port an Righ 



England, Midlands, in 

 boulder claj', derived ; 

 Swindon, Telford Road 

 clay-pit (H.S.); Yorks, 

 X. Ferriby, boring ; 

 Scotland, Port an Righ 



Yorkshire, X. Ferriby, 

 boring ; Scotland, Port 

 an Righ 



Marston (Swindon), iron- 

 shot, and \\'otton Bas- 

 set (H.S.-Monogr.) 



Wotton Basset, S\\'indon, 

 Hildesheim and Wur- 

 temberg, ^ (H.S.) 



Osmington and \\'ey- 

 mouth (H.S.) 



