The more important points in connexion with the structure of D. flabelliforme are:—

1. The absence of any real approach to the spiral arrangement of the thecae along the stipes.1

2. The absence of a common canal; and the consequent budding of each hydrotheca direct from the preceding one.1

3. The initial constriction of each hydrotheca cavity.

4. The budding of the bithecae from the sides of the hydrothecae along which they lie.

5. The early stage at which the presence of the bithecae is observed.

6. The derivation, indifferently “right-handed” or “left-handed” of the crossing canal.

7. The nature of the dissepiments—hollow bars derived principally as outgrowths of the bithecae.

Pygidium elongated, sublanceolate, bluntly pointed posteriorly. Lateral lobes flattened, horizontal, composed of three pairs of pleurae and a median postaxial piece. Axis short, conical, convex, tapering rather rapidly to blunt tip, less than one-third the length of the pygidium and about one-third its width, subcarinate posteriorly, faintly marked off from postaxial piece by weak circumscribing furrow; furnished at anterior end with one strong narrow complete ring, marked off by strong furrow, followed by weaker second ring defined by faint complete furrow, and with traces of a third incomplete ring; posterior two-thirds of axis devoid of annulations. Postaxial piece long, narrow, widening somewhat posteriorly, descending gradually to level of lateral lobes from tip of axis and becoming flattened but distinctly carinated for its whole length. First lateral pleura strongly falcate, bending back suddenly at fulcrum where it is widest and thence narrowing rather slowly to acutely pointed free tip projecting backwards beyond margin; pleural furrow submedian, diagonal, parallel to posterior edge of pleura, running nearly to tip. Second lateral pleura elongate, sublanceolate with tip bent back slightly and projecting freely beyond margin as short recurved point; pleural furrow median, slightly diagonal, not reaching tip. Third lateral pleura sublanceolate, broader than second pleura, incompletely marked off from postaxial piece posteriorly, the bounding furrow not quite reaching the margin but curving gently outwards at its end; tip of pleura undefined and not projecting beyond margin; pleural furrow median, slightly wavy, running nearly straight back parallel to its fellow, curving inwards a little at its end but not clearly connected with bounding furrow. All pleural and interpleural furrows of equal strength. Posterior lateral margins of pygidium behind tips of second pleurae forming nearly half its length and describing a long simple slight curve on each side, uniting behind in a blunt point at about 60°, the median carina of the postaxial piece extending to its tip.

The following notice of some fossils recently collected in the northern Malayan Province of Kedah, has been prepared at the instance of Mr. J. B. Scrivenor, M.A., F.G.S., Government Geologist of the Federated Malay States. A study of this new material has rendered necessary the revision of a published paper by the late Professor T. Rupert Jones, F.R.S., dealing with some supposed Phyllopod valves from the same country which were obtained from similarly constituted rocks as those at Kedah, although occurring at a more southern locality in the adjacent province of Perak.

Small species of Chonetes are frequently found crowding the limestones in the lower part of the Avonian Succession round Bristol and in the Mendips. Of these Ch. cf. hardrensis (Phill.) is the most persistently abundant throughout its range Km-Zl, but the two other species, Ch.failmulensis sp. nov. and Ch. stoddarti, Vaughan, here mentioned, occur in equally large numbers at particular levels within that horizon. The following notes are the outcome of the study of the material recently collected by Professor S. H. Reynolds, and myself, at St. Monica's Home of Rest, Westbury-on-Trym, but this has been considerably supplemented by specimens obtained from other localities in the district.