Page:Quarterly Journal of the Geological Society of London, vol. 35.djvu/883

PROF. J. BTTCKHA.N ON THE MIDFORD SANDS. 743 j- Very rare on the blocks of freestone. Brachiopoda, very crushed and fragmentary. We fancy we hare made out the following from Ham Hill : — Terebratula hemisphcerica, ~) Waldheimia carinata, Ehynchonella concinna, cynocephala. J . Other forms occur in oolite blocks in the sand bed. Lamellibranchiata. Avicula complicata. Buckm. Geol. of Cheltenham, t. 6. f. 5. Gervillia Hartmanni. Common on the sandy slabs. Ostrcea bullata. Ditto. Marshii. Ditto. Hinnites velatus. Ditto. Pccten clathratus, discites, • annulatus, >On the slabs intercalated in the sands everywhere. lens, demissus. J Lima densipunctata and others. Ditto. Pinna Hartmanni. Ditto. ampla. The same as the Cotteswold Great-Oolite species ; sands. Astarte elegans. Ditto. pullus. Ditto. • clathratus. Ham Hill. ■ rigida. Ditto. Trigonia sculpta. Bradford Abbas. formosa. Ditto. These forms are like those of the sands. There are perhaps two or three others of both the costated and clavellated forms in the sands. Isocardia concentrica. Sands. Modiola. Two or three forms. Tancredia donaciformis. Sandy stones. If the foregoing list be examined, fragmentary though it be, it will convince any one of the true Oolitic facies of the beds from which the fossils are derived. We conclude, then, from the foregoing remarks that the so-called Midford Sands are true Oolitic beds, not freestone at Midford, though decidedly so at Ham Hill, Doulting, and over a great part of the Cotteswolds. And we especially dissent from the notion that this sand bed at Midford or in Dorset can in any way be classed with the so-called Oolitic sands of some, Lias sands of others, of the Cotteswolds. They are, however, still confounded in our maps, though the sands below the freestones of the Cotteswolds are situated at least 100 feet below the sands of Dorset with which they have been confounded. Discussion. Mr. Hudlfston agreed with the author in regarding the Cepha- lopoda-bed of Dorset as quite distinct from that of the Cotteswolds. The real difficulty, he thought, would be found in the correlation of the Yeovil Sands.