^822.] Geology of the Isle of Wight, &;c. 333 



information respecting the other fossils of that formation is too 

 meager to afford us much assistance. 



2. Zoophytes. — (1.) We found between Freshwater Bay and 

 Brook Point many cyhndrical concretions, deeply tinged by the 

 red oxide of iron. They present such well defined spheroidal 

 terminations, that there can be no doubt of their being derived 

 from some organized body, though they do not exhibit distinct 

 traces of animal structure. 



(2.) Stems of the body described by Mr. Webster under the 

 name of the tulip alcyonium. The stellated transverse sections 

 of the stem,* which are so common in blocks derived from the 

 green sand formation, appear also in some beds of the iron sand 

 near Red-cliff. 



(3.) A compound Madrepore. The stellge arise from a pedicle, 

 and are grouped in a regular spheroidal form. Some of the 

 larger specimens appear to be formed by the union of several 

 distinct spheroids. They exist in the form of calcareous concre- 

 tions, in a reef of indurated iron sand, which appears below the 

 high water mark on the eastern side of Sandown Bay. It is a 

 continuation of some of the inclined beds of Red-cliff, and its 

 induration arises from the presence of a considerable quantity of 

 carbonate of lime. I am the more particular in describing this 

 locality, as it abounds in several fossil species which are in a 

 state of perfect preservation. I unfortunately reached the spot 

 when the tide was running in, and was only armed with a 

 hammer and a small chisel. Any one who wishes to investigate 

 the subject further, ought, after providing himself with more 

 powerful weapons, to visit the reef before the time of low 

 water. 



(4.) An obscure coralline body. From the same locality. In 

 its structure it has a general analogy with the bodies described 

 by Parkinson, vol.ii.p. 137, 138. 



3. Univalves. — (1.) Vermicularia. Sowerby, Min. Con. 

 pi. 57. Several traces of this genus were observed in the Red- 

 cliff reef above-mentioned. Along with them were some adher- 

 ing serpul(£. 



(2.) Ammonites. We found a single fragment of this genus in 

 a bed of coarse greenish sand near Brook Point. 



(3.) Rostellaria. Casts, sufficiently characteristic, to deter- 

 mine the genus, are found in the upper part of the cliff at Shank- 

 lin Chine. 



(4.) A highly ornamented univalve, with raised longitudinal 

 ribs, probably a rostellaria. In the same state with the preced- 

 ing. We met with fragments of the shell near Brook Point. 



(5.) Vivipara{?) A small species resembhng that which 

 abounds in the Purbeck marble. From the beds of shell lime- 

 stone near the top of the iron sand formation in Freshwater Bay. 



* Geological Transactions, vol. ii. plate 29, 



