THE JURASSIC DEPOSITS WHICH UNDERLIE LONDON. 745 
arisen from the circumstance that the strata in question consisted 
of hard and compact oolitic limestones alternating with marls of 
a more or less sandy character. Owing to the method of working 
by the diamond rock-drill the cores brought up consisted almost 
entirely of the former kind of rock, the softer marls being broken 
up and to a great extent washed away in the process of boring. As 
specimens of the oolitic limestone were found at short intervals, it 
was not unnaturally supposed by those who did not watch the boring 
and measure the cores brought up, that the boring was carried on 
almost wholly in that rock. Mr. C. Moore was, however, so 
fortunate as to obtain some small specimens of the softer and more 
marly deposits, which when broken up in water yielded him great 
numbers of minute fossils. 
The fossils contained in the oolitic limestones at Messrs. Meux’s 
well: were nearly all in the condition of casts: and most of them 
difficult of determination. Among them, however, I have been able 
to identify the following species :— 
Trigonia costata, var. pullus, Sow. | Nerinza (probably N. punctata, Voltz.). 
Tancredia axiniformis, Lyc. Cylindrites (probably C. excavatus, Lyc.). 
On washing the softer beds, specimens of which I obtained from 
the Rev. Mr. Winwood and the engineer of the works, I found 
such a large number of the minuter forms so closely in agreement 
_with those occurring at Richmond, though in a less perfect state of 
preservation, that no doubt remained, in my mind, as to the Great- 
Oolite age of the rocks in both localities. 
Subsequently the Rev. Mr. Winwood had the good fortune to 
find the actual specimens of minute fossils which Mr. C. Moore had 
washed from the softer beds of Meux’s well, and kindly placed 
them in my hands for examination. A careful study of all the 
specimens and a comparison of them with the fossils from Richmond, 
which are in a much better state of preservation, enables me to 
give the following list :— 
Fossils from the Oolitic Limestones and Sandy Clays occurring in the 
Well at Messrs. Meuw’s Brewery, Tottenham Court Road, between 
the depths of 1000 and 1064 feet. 
Natica cincta, Phil. (?). 
Chemuitzia, sp.” 
Nerinza punctata (?), Voltz. 
Cerithium, sp. 
Nucula, sp. 
Trichites, sp. 
Pinna, sp: 
Pecten articulatus (?), Schl. 
Lima duplicata, Sow. 
Gervillia or Pteroperna (?). 
Ostrea gregaria, Sow. (?),O. Marshii 
(young). 
Sowerbyi, Lyc. ¢ Mor. (young). 
-—— subrugulosa, Lye. § Mor. (young). 
Terebratula maxillata, Sow. (young). 
digona, Sow. (young). 
Rhynchonella concinna, Sow. (young). 
Thecidium triangulare, d’ Ord. 
Zellania globata, Sow. 
Stomatopora dichotoma, Lame. 
Diastopora diluviana, Lame. 
microstoma, Mich. 
Idmonea triquetra, Lame. 
Entalophora richmondiensis, Vine (?). 
Terebellaria increscens, Vine (?). 
Lichenopora Phillipsii, J. Haime (?). 
Fasciculipora Waltoni, J. Haime (?). 
Pentacrinus scalaris, Goldf. 
Pentacrinus, sp. 
Apiocrinus, sp. 
Cidaris bradfordensis, Wr. (spines). 
Cidaris, sp. 
Acrosalenia (spines). 
Astropecten (marginal and eye-plates). 
