I 
WOODWAED — ON ECHINOTHUEIA FLOEIS. 
327 
form is concerned, you may ignore the glacier altogether. It only 
helps the torrent here and there by exposing a surface and by carry- 
ing off the rubbish which the workijig water throws down ; but the 
two sculptors are natural disintegration and the stream, and eyery 
existing form in the Alps is distinctly traceable to one or other of 
these forces combined with the internal geological structure." 
I ON ECRIXOTRURIA FLORIS, A NEW AND ANOMA- 
LOUS ECHINODERM EEOM THE CHALK OF KENT. 
By S. p. Woodward, E.G.S. 
The fossils represented in the accompanying Plate are probably only 
fragments of the original structure, and possibh' onl}^ the smaller and less 
essential portions of the whole. Neyertheless I haye determined to pub- 
lish some account of them, although at the risk of committing an extrava- 
gant error, as a last resort towards obtaining more complete examples or 
suggestions for their more correct interpretation. 
Both specimens have been presented to the British Museum ; one by J. 
Wickham Flower, Esq., of Park Hill, Croydon, the other by the llev. 
Norman Glass, of London. 
The first example (Fig. A) was obtained, at least sixteen years ago, from 
the Upper Chalk of Higham, near Rochester, and was submitted to Prof. E. 
Forbes, in whose custody it remained for several years. It was originally 
shown to me in connection with the anomalous Cirripede Loncida, then 
newly discovered by Mr. Wetherell. The resemblance between them is 
certainly curious ; but there is no real relationship. Mr. Flower's fossil ex- 
hibits distinct traces of the crystalline structure peculiar to the petrified 
Echinodermata, and the pairs of pores in the ambulacral plates are equally 
characteristic of the Echinidse. Mr. Darwin also has examined this fossil 
and rejected it from his province of inquiry. 
Prof. Forbes could not make up his mind to describe the specimen, and 
ultimately it was returned to Mr. Flower, with whom it remained until 
the publication of a note on the genus Proto-ccJiinus, by Major Thomas 
Austin, in the ' Geologist ' for 1860 (V ol. III. p. 446), when it was entrusted 
to me for the purpose of considering whether it had any special afiinity 
with this new type, and for description in the same journal. 
The Proto-echinus was obtained from the Carbouiferous limestone of 
Hook Head, Wexford, and is but a fragment of a single ambulacrum, con- 
sisting of three series of plates at the wider end and two at the other ex- 
tremity, with apparently a single terminal plate. Each plate is perforated 
by a pair of pores. It differs from Echinothuria in every particular. 
