36 Dr. Arnott on the Genus Langsdorffia. cium umbellatum, in a very reduced state and generally with only a single flower to each stem. An account of the botany of Connamara having been published by my friend Mr. Ba-bington in vol. ii. of the Mag. Nat. Hist, it will be unne-cessary to add anything further as to this district. On the lime-stone rocks at Kilcornan near Galway, 1 collected Grammitis ceterach, Melissa Calamintha, Asperula cynanchica, Euonymus europceus, Saxifraga tridactylites, &c. ; also, which may ap-pear somewhat remarkable, on level ground near the sea, Ju-niperus nana in great abundance and luxuriance. I cannot close this brief notice without expressing my ob-ligations to my friend Mr. Babington for his assistance in the determination of many of the plants here mentioned. It is hoped that these results of a very hurried visit to some little frequented parts of Ireland, may tempt some British na-turalists to bestow a more careful examination on the hitherto little investigated districts of the west, where there can be no doubt that much would be found to repay their exertions. IV. — Some Account of the Genus Langsdorffia. By G. W. Arnott, Esq., LL.D. Langsdorffia Mart. Recepiacula solitaria, stipites simplices terminantia, unisexualia. Flores masculi inter paleas clavatas basi complanata in favi modum nexas sessiles. Perigonium infundibuliforme, limbo 3 — 5-fido, laciniis sestivatione indupli-cato-valvatis. Stamina 3 — 5, monadelpha, perigonii laciniis opposita ; co-lumna solida, tubo perigonii adnata, parte libera anthesis breviore : antherae connatae, extrorsse, biloculares ; loculi sequales, juxta totam longitudinem debiscentes. Ovarii rudimentum nullum. Flores feminei (imperfecti ?), confertissimi, pedicellati. Stylus filiformis simplex. Ovarium stipitatum in stylum gracilem attenuatum. Herbse carnosce, stipites e rhizomate hypogceo crassiusculo assurgentes, simplices, squamis obsessi, monocephalL Capitula unisexualia, alia ex eodem rhizomate mascula, alia feminea. 1. h.janeirensis; rbizomate repente subsimplici, stipitis squamis arete imbricatis lanceolatis villoso-fimbriatis, perigonio masc. trifido laciniis demum patentibus, floribus fem. (glandulam nullam ambientibus T) infra stylum bulboso-granulosis. — L. janeirensis, L. C. Richard, in Mem. du Mus. d'Hist. Nat. viii. p. 412. t. 19. — L. hypogsea, Mart. Journ. von Brasil, ii. p. 179 ; Nov. gen. et sp. iii. p. 181. t. 299. Hob. in sylvis umbrosis circa Rio Janeiro. As no notice is taken of the glands which in the next are
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