PRESTWICH WOOLWICH AND READING SERIES. 



117 



of Heme Bay and Boughton, and in a beautiful state of preservation 

 with every marking retained. As at the two former places the cha- 

 racteristic shell is the Corhula Regulbiensis, which occurs aggregated 

 in masses ; the Cucullcea crassatina is also abundant, as likewise the 

 large Ctfprina Scutellaria* . Although silicified and hard, they are, 

 when first found, extremely brittle ; and perfect specimens, except 

 of the Corhula, are difficult to be procured. 



In Essex and Suffolk I have not been able to find any organic re- 

 mains in the few sections exposed in this division, with the possible 

 exception of an oyster at Kyson. Nor does the Rev. W. J, Clarke, 

 who was well acquainted with Suffolk, mention the occurrence of 

 any fossils in the numerous localities he describes f. 



List of the Organic Remains of the Woolwich and 

 Reading Series;];. 



[The second column gives their synonyms, and the third indicates whether 

 their range is in the Western (W.), Central (C), or Eastern (E.j areas. 

 See the area-divisions in p. 78. The " n. sp." refer to the new spe- 

 cies described by Mr. Mon-is, and figmed in PI. II. of this volume.] 



Bivalves. 



C.semigranulosum,Desh. n. Sow. 



Area depressa. Sow \ A. striatularis, Melleville? 



Cardium Laytoni, Mor., n. sp. . . 



Plumsteadiense, Sow. (a). . 



Corbula (Arnouldii, Nystl) (A). . 



Regulbiensis,iHor.(cj,n. sp 



var. i3. Mor 



Cucullaea crassatina, Lam 



Cyprina Morrisii, Sotv 



Scutellaria, Desh 



Cyrena cordata {d), Mor., n. sp. 



cuneiformis, Fer 



deperdita, Sow 



intermedia, Mell 



tellinella, Desh 



Cytherea Bellovacina, Desh. (e). 

 Dreissena serrata, Mell."? (/").... 

 Glycimens Rutupiensis, Mor. ■ . 



Lithodomus 



Modiola Mitchelli, Mor. (ff),n. sp, 



dorsata, Mor., n. sp 



Nucula fragilis, Desh 



Ostrea Bellovacina, Desh 



tenera, Sow 



Pholas? 



C. decussata, Park 



Venus ovalis. Sow. M.C. pi. 567- 

 fig. 2, non fig. 1 ? 



non C Scutellaria, Nyst 



an C. obovata,var. a. Sow. pars? 

 Cyclasde2)erdita,Tk.te\t,non^g. 

 non C. deperdita, Desh. or Park, 

 an C. Deshayesii, Heb 



C. orbicularis, Mor. 



. pulchra,edullna, undulata, S. 

 0. angusta &r, plicatella, Desh.? 



C. 

 E. 

 C. E. 

 E. 

 E. 

 C. 

 E. 

 E. 



E. 

 C. 

 C. 

 C. 



c. 

 c. 



E. 



c. 



C.?E. 

 E. 

 C. 

 C. 

 C. 

 W. C. 

 C. 



c. 



* Some specimens of this shell measure 4 inches by 3. 



t The recent section at Chelmsford (Artesian well, Appendix) would seem to 

 show that shells do there exist. I was, however, unable to see the specimens, 

 or to learn exactly whether any had been kept. They would probably be cnished 

 by the auger, as the bore-hole was very small. 



X I have to express my obligations to Mr. Morris, IMr. Edwards, and M. Des- 

 hayes for their kind aid and assistance iu the comparison of many of these fos. 

 sils. To ^h■. Morris I am furthei indebted for the description of the new species. 



