1859. J 



WEIGHT — INl'KRIOR OOLITE. 



25 



Fossils from No. 



Ammonites Parkinsoni, Sow. (small). 



Humphriesianus, Sou>. 



taviusculus, Sow. 



,8p. (unnamed; inform of moulds) 



Belemnites ellipticus, Mill. 

 Peurotomaria proteus, Deslong. 



elongata, Sow. 



Littorina (in moulds). 

 Myopsis Jurassi, Brong. 

 Pleuromya elongata, Boetner. 



donacina, Ag. 



Pholadomya ovulum, Ag. 



obtusa, Sow. 



fidicula, Sow. 



Heraulti, Ag. 



Lima pectinifonnis, Schioth. 

 Modiola gibbosa, Sow. 



5. The liagstones. 



I Astarte excavata, Sow. 

 Ceromya Bajociana, eP Orb. 

 Trigonia striata, -Sow. 

 Tancredia donacifonnis, Lye. 

 Gervillia Hartmanni, Goldf. 

 Pecten lens, Sow. 

 Terebratula perovalis, Sow. 



sphivroidalis, Sow. 



globata, Sow. 



Khynchonella plicatella, Sow. 



spinosa, Schloth. 



Magnolia Forbesii, Wright. 

 Stomecliinus intermedius, Ag. 

 Echinobrissus cliuiicularis, Lhwyd. 

 Holectypus depressus, Lamk. 

 fsastnra helianthella, M'Coy. 

 Stylina solida, M'Coy. 



Fine-grained Oolite or Building-stone (No. 6). — This undoubtedly 

 overlies the liagstones, and can only be seen on Dundry Down, in 

 the old open and under-ground quarries, where it has been ex- 

 tensively worked for chureh-biulding and other purposes. 



This fine-grained oolite much resembles the Portland-stone. 

 Few or no organic remains occur in this bed, which mea-sures from 

 4 to 5 feet in thickness. 



Coarse Oolite. Building-stone or Freestone Beds (No. 7). — This is 

 the highest set of beds observable on Dundry Hill ; and although 

 they are not rich in fossils, still there are certain conditions of the 

 beds and forms of fossils deserving special notice. Most, if not all. 

 of the building-stone of Dundry comes from quarries opened in this 

 " top rock" (so called by the men). Numerous casts of Trigonia?, 

 and several species of Corals, are common to this and the upper pari 

 of the beds 3 and 4 ; whilst other fossils are rare. The mass of the 

 rock is composed of finely triturated shell-sand, or debris of shells 

 closely and densely arranged, which, on weathering, stand out in 

 sharp relief. 



False-bedding constantly occurs throughout this series. The 

 organic contents of this lnrilding-stone, as tar as I have l>een able to 

 detennine, are as follows : — 



Fossils of No. 7. Bwlding-9toru or Frtettone. 



Trigonia costnta, Sow. "I Only sparingly 



V 

 -tri.-iia. 8ow. distributed. 



i explanata, Ooldf. 



heliunthflla. M ( : 



Stylina solida. M'Coy. 



Thamnaatnea De&andanBi Echo. >1 



lliiiim . 



Latomnaadra Flenringii, Edw.$ Berime, 

 I- latnea tenuistriata, WOoy. 

 Pentaorinua Riilleri, Austin. 



— E. I . 



C. Section from tJu Cornbrath to tl>, MUUpore-bed, in QruQ 

 Bay, Forkskire*. -No. 1. the Cornbrash, rises on the Boat at New- 

 biggin Wyke, at the smith side of Grisfhorpe Bay, near the plaoe 



* The reader may oonaull with moofa profli Profeaaor Williamaon'a excellent 

 noteeon this notion in tin* Trana. Geo! Boo. 2nd aeriee, vol. ri p I t."> Ifon 



