44-0 
TIIM CiEOI.OGlST. 
Ft. In. 
1. Tliln bands of freestone 4 G 
2. Brown raggy coralline bed 9 0 
3. Com])aet grey limestone 5 0 
4. AVorkable 'beds of great oolite 20 0 
The grey limestone (No. 3) contains many organic remains, but 
owing to its liard and intractable character few are to be extracted 
entire. In its weathered edges may be seen the Lima cardilformis, 
TricMtes, lAthodomi, and many corals. 
The raggy bed (No. 2) is very incoherent, and appears to have 
been an ancient coral reef, it being in great part composed of corals 
and sponges. Intermingled with these branching corals are myriads 
of beautiful organisms, which, from the unconsolidated nature of the 
bed, are easily extracted. They consist of dismembered ossicles of 
starfishes, the plates and occasionally the bodies of the Bradford 
Encrinite (Apiocrinus P a rhinsoni) , spines and shells of Echini, OystrseiB, 
and other mollusca, and with them very many specimens of a small 
Brachiopod, which has hitherto been considered the young of Tere- 
hratula maxillata, but which I shall presently show is to be referred 
to Terehratella. 
The Brachiopods obtained at Hampton consist of Terehratula 
cardium, T. coarctata, T. digona, T. hemisjjherica, T. maxillata, Rliijn- 
cJwnella concinna, R. ohsoleta, Crania antiquior. It will thus be seen 
that only three genera of Brachiopods have hitherto been known in 
the Great Oolite, and the bed under consideration. To these I have 
now to add four other genera, viz., Terebratella, Terebratulina, The- 
cideum, and Zellania. 
Tekebratula maxillata. Sow. PI. xiii., figs. 6, 7. 
The adult form of this shell is found at Hampton, though usually 
either in single valves, or in a crushed state. The young ages of 
this shell are exteraally hardly distinguishable from the Terehratella 
BucJcmani, described below. It differs from the latter shell in its 
beak being more truncated, and the foramen more rounded ; it is 
also usually longer than broad, a character it loses when more adult. 
Internally the generic difference is at once apparent, as this shell 
possesses a short reflected loop, which in Terebratella is doubly 
attached. 
Terebratula hemisph^rica. Sow. 
A pretty little shell, originally figured by Sowerby under the name 
of Terehratula Itemisphmrica, is not uncommon at Hampton Cliffs. 
This was subsequently removed by D'Orbigny from that genus, and 
placed with the Terebratellae ; and on the authority of the species to 
which I now refer, that author carried the latter genus into the 
oolites, in which he was followed, although with some hesitation, by 
