fitton's section at atherfield. 319 



Avicula lanceolata. Area MaruUensis. 



Gervillia alseformis. Cornueliana. 



Perna Ricordiana, d' Orh, Pectunculus MaruUensis. 



Arcopagia. Two species — probably Cardium Ibbetsoni. 



belonging to this genus. Isocardia Neocomiensis ? 



Cyprina rostrata ? 



Venus (two species T). Rostellaria Robinaldina. 



Thetis minor. Pterocera ? 



Modiola aequalis. Actaeon (tAvo species). 



Trigonia alaeformis. Cerithium ? 



Turbo ? 



Nucula lineata (same as the Blackdown, Natica laevigata. 



and differing from N. scaphd). near to Cornueliana. 



Area Raulini. Ammonites {^A. consobrinus, young ?). 



d. About ten feet higher up is the first of the new beds of Gryphcea 

 sinuata above-mentioned ; and about eight and a half feet from it an- 

 other range of Gryphsea, the upper I believe of two discovered by 

 Captain Ibbetson. The place on the coast we were informed is called 

 *' Shanklin Point." The specimens of the second bed here are large and 

 distinct, the Gryphsea marked by a prominent ridge, and with them is 

 Ostrea carinata. The sand which includes these fossils contains oolitic 

 iron ore, like that of both Gryphsea groups (13 and 36) near Ather- 

 field, and their situation corresponds well to that of No. 43 of my 

 section and Table. 



Here then are equal portions, each about 100 feet in thickness, of 

 beds not merely corresponding as to general position, but almost con- 

 timious, and less than eight miles apart ; yet in the one, near Black- 

 Gang Chine, we find no recognizable fossils, or scarcely any, while the 

 other contains two prominent ranges of a characteristic species, with 

 nearly fifty smaller fossils, in great abundance ! Nothing surely can 

 better show the great variation produced by slight distance, — or prove 

 more clearly the necessity for caution in forming subdivisions of the 

 deposits in which such local differences are to be fomid. 



e. The next group,- ascending, is that of Horseledge, which furnishes 

 the nodules sold by the collectors at Shanklin Chine, consisting of 

 ferruginous masses not distinguishable from those of No. 45 of the 

 Table, and already mentioned as resembling also those of Parham 

 Park in Sussex, Sandgate and other places. It will be sufficient to 

 mention here the following species, which are common to all those 

 places : — 



Specimens from ^^ Horseledge'* on the shore west of Shanklin. 



Panopsea plicata, Sow. Terebratula multiformis ?, Roemer, 

 Trigonia alaeformis, Park. (T. sulcata ? Park.) at Horseledge only. 



Thetis minor, Sow. Littorina rotundata (Natica ?). 



Gervillia anceps, DesA. Rostellaria Robinaldina, tZ'0r6. 

 Terebratula sella. 



I shall not carry this description farther, not having examined the 

 remainder of this section in detail ; but it was evident that the upper 

 beds of the series are much more fossiliferous here than at Black- 

 Gang Chine. 



z 2 



