Ranunculus repens. 
Plantae. 
Rubus fruticosus. 
Rhinanthus cristagalli. 
The mollusca mentioned below are amongst those which are 
not represented in the recent British Seas. 
Diseliides bifissum. 
Dentalium dentalis. 
,, candidum. 
,, panormum. 
Chiton siculus. 
Fissurella costavia. 
Solariella acutangula. 
,, approximata. 
Trochus turgidulus. 
Cyclostrema elegantula. 
Rissoa cimex. 
,, montagui. 
„ deliciosa. 
,, scutula. 
,, bicarinata. 
,, multistriata. 
Cithna minima. 
Hydrobia compactilis. 
Barleeia cingulata. 
Turritella incrassata. 
Mesalia breviaiis. 
Odostomia elongata. 
Chemitza formosa. 
„ gracilis. 
Scalara foliacea. 
sp. 
Adeorbis supi’anitida 
Nessea lineolata. 
Pleurotoma bertrandi. 
Ostrea lusitanica. 
,, cochlear. 
Pecten aratus. 
,, flexuosus. 
,, hyalinus. 
,, scabriusculus. 
Pecten audouinii. 
,, proteus. 
Kellia ambigua. 
Cardium papillosum. 
,, inaequalis. 
,, strigilliferum. 
Astarte pygmaea. 
Cardita trapezia. 
,, chamaeformis. 
Lucinopsis Lajorikaireana 
Lutraria rugosa. 
Tapes peroyalis. 
In preparing the above lists I hnve been much indebted to Messrs. Smith- 
Woodward and Newton (Pisces), T. Scott ^Ostracoda), E. R. Vine (Polyzoa), 
Millett and Chapman (Foraminifera) ; and to Messrs. Etheridge and Gregory for 
general assistance. 
A careful examination of the foregoing lists makes it at once 
evident that we are in the presence of a fauna which has no 
equivalent in the British post-tertiaries, not only because of 
its purely southern aspect, but for the number of species in 
common with those of the older and undisturbed Pliocene 
deposits of the east coasts, including some of which the present 
habitat is unknown. The proportion of Mollusca common to 
Selsey and the Crags (marked x.) is nearly 45°/ 0 , of the 
Polyzoa nearly 90°/ o . 
The question at once arises, that deposits so alike in their 
general facies, yet so widely separated in time and space, must 
have had some common source of origin, possibly on the lines 
indicated in the following notes. 
In a valuable preliminary study of the fossil shells of the 
Touraine Faluns, M. M. Dollfus and Dautzenberg point out 
that the Miocene seas of Europe occupied three areas or basins, 
certain species being common to all The Saxon covering 
North Germany, Belgium., and Holland ; the Atlantic, Touraine 
and West France; and the Mediterranean, South Europe. 
In the north the onward progression from the Miocene to 
the Pliocenes is not marked by an}^ violent fluctuation, but by 
a gradual extension westward of the Diestien Seas into 
