302 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



IV. Lower GryphcEa Group {Nos. 11, 12 and 13). 



11. The bed immediately above the "Crackers Group" consists of 

 brown or rust-coloured sand, with indications of fossiliferous nodules 

 at the bottom. Thickness about 21 feet. 



12. Terebratula bed : next is a stratum 2 feet in its greatest thick- 

 ness, of sand containing Per7ia alceformis, with Terebratula Sella in 

 profusion. This latter species has been found also near the bottom of 

 this section in the second Perna bed, — above in No. 45, and in several 

 intermediate places, thus pervading the whole series of fossiliferous 

 strata ; but it is nowhere so numerous as here. 



13. The Lower Gryphcea bed, which is conspicuous on the shore 

 under Atherfield High ClifP, is about 1 feet thick, 7 or 8 feet at the 

 lower part consisting of brown and reddish sand and sand-rock, with 

 polished fragments of brown iron ore ; above which are ranges of 

 Gr'yphcEa sinuata. In the coarse sand at the bottom. Pinna Robi- 

 naldina (d'Orbigny) is frequent ; and in the fallen masses on the 

 shore the brown iron ore is distinctly oolitic — a form of iron ore which 

 has not hitherto been recognized in the Lower Greensand of En- 

 gland |. But the ferriferous beds of this formation in Surrey and 

 Sussex so much resemble these, that the presence of oolitic grains 

 among them is highly probable. 



In the larger fallen masses on the shore here, are fine specimens 

 oiHinnites Leymerii, with Ostrea Leymerii in one or two continuous 

 ranges, and indications of perhaps two other species of Ostrea, one 

 remarkable for the thinness of the shell. Very large specimens of 

 Gryphcea sinuata with a strongly marked dorsal ridge are frequent. 



Fossils of the Lower Gryphcea Group. (Nos. 11, 12, 13.) 



11. tGervilliaal8eformis(P<?nifl, Sow.). 12. Terebratula Gibbsiana, var. 



f Lithodoraus oblongus. sella, Sow. (in profusion). 



Grj'phaea sinuata (var. Couloni). 



13. Lower Gryphcea Bed. 



*Loncliopteris Mantellii. fOstrea Leymerii. 



j-*Cricopora § gracilis. carinata?, Sow. 



tHeteropora§. prionota. 



Brissus. Pecten orbicularis. 



Panopsea plicata, Sow. interstriatus, d^Orb. 



Trigonia rudis. striato-costatus ?, Leym. 



Pinna Robinaldina?, d'Orb. fHinnites Leymerii. 



sulcifera ?, Leym. fAnomia convexa, Sow. 



*Inoceramus Neocomiensis, d'Orb. Terebratula sella. 



{conc€ntricus},Yoxhe^). Serpula plexus (^or^ea^e's ?, Goldf.). 



Gryphsea sinuata (many varieties ) . antiquata. 



X Oolitic iron ore is abundant also in the Lower Greensand near Vassy in France, 

 where I have seen it under the guidance of M. Cornuel ; and apparently throughout 

 the range of this deposit from thence to Auxerre. 



§ Mr. Lonsdale has informed me since these sheets were sent to the press, that 

 he does not consider the genera of the corals which I had sent to him for examina- 

 tion as having beeii precisely ascertained ; I have therefore added a query to the 

 name of each genus : — and I hope that Mr. Lonsdale's health and leisure will allow 

 him to examine generally the corals of this part of the subcretaceous system at no 

 very distant time. 



