THE JURASSIC DEPOSITS WHICH UNDERLIE LONDON. 743 
The same is true of all the other fossils found in this bed of clay. 
It cannot be doubtful that the colonies of branching Bryozoa and 
Crinoids, with the Brachiopoda in every stage of growth lying among 
them, were overwhelmed and buried by a sudden influx of muddy 
sediment over the sea-bottom where they grew. So exquisitely are 
many of these fossils preserved, that, as will be shown in the 
appendix to this paper and in those which follow it, they serve in 
not a few cases to clear up difficulties which had hitherto existed 
concerning the structure of the species to which they belong. 
Inst of Fossils from the Great Oolite under Richmond (Surrey). 
Lamna (teeth). 
Nerinza Eudesii, Lyc. § Mor. 
Natica, sp. 
Pholadomya Heraulti, Ag. 
Lima, sp. 
Avicula, sp. 
Pinna, sp. 
‘Trichites, sp. 
Pecten rushdenensis, Lyc. 
Ostrea gregaria? Sow. (young of O. 
Marshii (?), Sow.) 
Sowerbyi, Lye. § Mor. 
subrugulosa, Lyc. & Mor. 
Terebratula maxillata, Sow. 
(Dictyothyris) coarctata, Park. 
Rhynchonella concinna, Sow. sp. 
Stomatopora dichotoma, Lamz. 
—— Waltoni, J. Haime. 
Diastopora diluviana, Lame. 
microstoma, Mich. 
microstoma, Mich. var. con- 
nectens, Vine. 
Lamourouxii, Hawme. 
idmonea triquetra, Lame. 
Entalophora straminea, Phill. 
richmondiensis, Vine. 
richmondiensis, Vine, var. 
pustulopora, Vine. 
Terebellaria increscens, Vine. 
Lichenopora Phillipsi, J. Haime (?). 
Heteropora conifera, Lame. 
Fasciculipora Waltoni, J. Haime(?). 
Serpula intestinalis, Phed/. 
—— lacinatus, Phill. 
Vermicularia nodus, Phill. 
Pentacrinus scalaris, Goldf. 
Pentacrinus, sp. 
Apiocrinus, sp. 
Bourgueticrinus, sp. ? 
Astropecten (marginal, and eye- 
plates; spines ?). 
Cidaris bradfordensis, Wr. (spines 
and plates). 
, Sp. 
Acrosalenia pustulata, Forbes, sp. 
(spines). 
, Sp. (spies), . 
Hemicidaris, sp. (spines). 
Inobolia micula, Hznde. 
Peronella nana, Hinde. 
Blastinia cristata, Hinde, 
pygmeea, Hinde. 
Oculospongia minuta, Hinde. 
Bairdia Hilda, sp. n. 
jurassica, sp. n. 
, var. tenuis, nov. 
Cytheridea subperforata, sp. n. 
Cythere Guembeliana, sp. n. 
drupacea, sp. n. 
—— Blakeana, sp. n. 
— ? tenella, sp. n. 
— Bradiana, sp. n. 
— (Cythereis) quadrilatera, Rom. 
? sp. 
Cytherella subovata, sp. n. 
jugosa, sp. n. 
Miliola (Quinqueloculina), sp. 
Lagena levis, W. & J. 
Frondicularia oolithica, Terg. 
- , var. regularis, nov. 
Vaginulina levigata, Rom. 
Marginulina raphanus, Lin. 
Cristellaria crepidula, F. & M. 
rotulata, Lam. 
—— cultrata, Monéf. 
Spirillina helvetica, K. & Z. 
crassa, Z. f° K. [var. 
Planorbulina Haidingeri, @’Orb., 
—— farcta, Ff. & WM, var. 
Pulvinulina elegans, d’ Orb., var. 
tenella, nov. 
Webbina?, sp. 
—_——- 
The 873 ft. of Great-Oolite strata at Richmond are found resting 
directly upon rocks which, as we shall hereafter show, are pro- 
bably of Poikilitic age; the Inferior Oolite, Lias, and Rheetic being 
quite unrepresented. In this respect the relations of the Lower 
3D 2 
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