Miscellaneous. 293 terrupta, and am now quite satisfied of its distinctness. Its leaves are all blunt and apiculate, oblong ; its heads are ten to twentj' in each cluster, and prominently 5-angled as in F. Jussicei (C. et G.), but they are deeply sunk in tomentum as in F. germanica ; the cluster is overtopped by one or two blunt leaves which are wanting in the latter and acute in the former. There are also other differ-ences. It is the F. lutescens of Jordan (Plantes Nov. de la France, iii. 201. pi. 7. fig. B.) ; that name was published in Sept. 1846, Mr. Smith's name in July 1846. The pubescence of the three plants is very dilFerent and they are quite distinguishable at sight. I may add that the F. Jussieei (C. et G.), which occurs plentifully from within two miles of Cambridge to the town of Linton, is probably, as remarked by Jordan, the F. spatulata (Presl) ; if so, that name must displace the one given by Cosson and Germain. I believe that, previously to the discovery of F. Jussicei near Linton by Mr. G. S. Gibson, it had been found in Sussex by Mr. Mitten, and in Dorsetshire by Mr. Woods. — C. C. B. Note on the genus Allorisma. By William King, Esq. Having satisfied myself that this genus, as I first described it (Annals of Natural History, November 1844), comprises two distinct genera, one of which is the Edmondia of De Koninck, I will here briefly point out a few of its distinctive characters, as now restricted, reserving a fuller descrij)tion for my Monograph. I consider Allo-risma regularis* as the type of the genus. Allorisma possesses a sii)honal inflexion, an edentulous hinge, and an external cartilage. It diff^ers from Pholadomya — a closely-related genus — in the want of ribs proceeding from the umbones to the ventral margins, the valves being more or less wrinkled transversely. The anterior muscular imi)ressions have a low or proximo-ventral position as in Thracia pubescens. Allorisma elegans, n. sp. Form very inequilateral : both ends closed ; anterior one the shortest, and oblique superiorly ; posterior one squarish : umbones somewhat gibbous : dorsal slopes with a faint angle running from the umbone to the posterior end of the shell : surface slightly wrinkled transversely, and crowded with minute pim])les : pallial sinus shallowish. Amphidesma lunulata, Keyserling, of the Petchora Permian marls, may be the same species. Humbleton and Whitley. — Catalogue of the Organic Remains of the Permian Rocks of Northumberland and Durham. Melilotus arvensis, Wallr. On a recent visit to the neighbourhood of Thetford (July 28) in company with ?vlr. Borrer, Mr. G. S. Gibson, and Mr. Newbould, I had the pleasure of gathering specimens of this plant which grows there in considerable quantity. I am unable to state to which of the party the discovery belongs, but believe that it lies between Mr. * Geul. Riiss. vol. ii. pi. If). fi<j. 9. — The fossil under this name, in pi. 21. fig. 11, is an Edmondia.
BioStor
