DESCRIPTION OF PLATE V. FOSSIL SHELLS FROM THE LOWER GREEN-SAND DEPOSITS. Fig. 1.—Thetis minor; from the ferruginous sand-rock at the base of Shanklin Cliff. 2.-Another view of the same, to show the beaks and hinge-line. 3.-Gryphea sinuata; represented one-fourth the natural size; it is often found much larger. From the Green-sand at Shanklin, Ventnor, Sandown, &c. 4.-Tornatella albensis; from the Cracker Rocks, Atherfield. 5.-Terebratula sella; an abundant shell in the sand at Atherfield. 6.-Nucula scapha; from the sand-rock, Atherfield. The three following shells are imbedded in a fragment of the Crackers' Rock, from Atherfield. 7.-Natica rotundata. 8.-Pterocera retusa. 9.-Rostellaria Robinaldina. 10.-Cerithium turriculatum; from Atherfield. 11.-Scaphites gigas; from Atherfield. The figure is but one-third the size, linear, of the original. This fossil is often found two feet in length, associated with Ammonites equally gigantic. |