Miscellaneous. 293 



terrupta, and am now quite satisfied of its distinctness. Its leaves 

 are all blunt and apiculate, oblong ; its heads are ten to twent}' in 

 each cluster, and prominently 5-angled as in F. Jussitei (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 different and they are 

 quite distinguishable at sight. I may add that the F. Jussicei (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 description for my Monograph. I consider Allo- 

 risma regularise as the type of the genus. Allorisma possesses a 

 siphonal inflexion, an edentulous hinge, and an external cartilage. 

 It differs 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 

 impressions 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 

 pimples : pallial sinus shallowish. Amphidesma lunuiata, 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 Mr. 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. 



* Geol. lluss. vol. ii. pi. 19. fisj. 9.— The fossil under this name, in pi. 21. 

 fig. 11, is an Edmondia. 



