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Show 342 ISLAND LIFE. fi. Seligeria calcicola .............. .. 6. Pottia viridifolia ................. . 7. Leptodontium recurvifolium .. . 8. 'l'ortula woodii ................... .. 9. , hibernica ................. . 10. 8treptopogon gernrnascens ...... . 11. Grimmia subsquarrosa .......... .. 12. , stirtoni ................. . 13. Glyphomitrium daviflsii ........ . 14. Zygodon nowe1lii .............. .. 15. Bryum barnesii ................. .. Soulh of England. South of England. Ireland aud Scotland. Ireland. Ireland. Sustsox. North Britain. North Britain. On basalt generally. North Britain. North Britain. [PART 11. 16. Hoolceria laeteviren.<~ ..... ........ .. 17. Daltonia splachnoides ........... . Ireland and Cornwall (also Madeira). Ireland. III!:l'A'l'ICJE. 1. Gymnomitrium crenulatum ... West Englan<l, Irolaud. 2. Hadula voluta .. .... .. . .. .. .. .. .. .. Ireland and Wale~. 3. Acrobolbus wilsoni .... .. ...... .. .. Ireland. 4. Lejeunia calyptrifolia ............ Cornwall, Lake distric1, Irelanrt ·5. , rnicroscopica............ Ireland. 6. Lophocolea spicnta . .. . .. .. .. .. .. . Ireland. 7. Jungermannia cuneifolia . . ..... Ireland. 8. , doni ana .. . ... . .. Scotland. 9. Petalophyllurn mlfsii.. ... .. .... . \Vest BritA. in, Ireland. Many of the above are minute or obscure plants, and arc closely allied to· other European species with which they may have been confounded. We cannot therefore lay any stress on these individually as being absent from the continent of Europe so much of which is imperfectly explored, though it is probable that some of them are really confined to Britain. But there are a few-indicated by italics-which are in a very differCJtt category; for they belong to genera which are altogether tmknown in any other part of Europe, and their nearest allies arc to be found in the tropics or in the southern hemisphere. The three non-European genera of mosses to which we refer all have their maximum of development in the Andes, while the three non-European Hepaticre appear to have their maximum in the temperate regions of the southern hemisphere. Mr. Mitten has kindly furnished me with the following particulars of the distribution of these genera:- STREPTOPOGON is a comparatively small genus, with seven species in tl1e Andes, one in the Himalayas, and three in the south temperate zone, besides our English species. DAI/l'ONIA is a large genus of inconspicuous mosses, having seventeen species in the Andes, two in Brazil, two in Mexico, one in the Galap:~g u ·, ., UllAl'. X\'l.l 'l'llE BUI'l'ISH ISLES. six in India anu Ceylon, five in Java, two in Africa, and throe in the Antarctic Islands, and one in Ireland. IIooKERIA (restricting that term to the species referable to Cyclodictyon) is still a Iaro-e genus of handsome and remarkable mossef:l, having twentysix species i; the Andes, eleven in Brazil, eight in the A~til~es, one in. Mexi~o, two in the Pacific Islands, one in New Zealand, one 1n Java, one m Indw, ar.d five in Africa-besides our British species, which is found o.Jso in Madeira and the Azores but in no part of Europe proper. These last two are very remarkable cases of distribution, since Mr. Mitten assures me that the plants are so markedly different from all other mosses that they would scarcely be overlooked in Europe. . . The distribution of the non-European genera of HepatiCre 1s as follows :- AcnoJJoLnus. A small genus found only inN ew Zealand and the adjacent islands, besides Ireland. . . . . Ll•;JEUNIA. A very extensive gonuR nboundmg 111 the tropical reg1ons of AnlCric ·t Africa the Indiau Archipelago, and the Pucifte Islands, reaching to Now (Z' ealand 'a nd Antarctic America, sparingly represented m· t1le nn ·t 1·s1 1 a11d Atlantic Islands, and in N ortb America. Prr.TALOl'IIYLLUM. A small genus confined to Australia and New Zealand in tl1e southern hemisphere, and Ireland in the northern. . \Vo have a leo a moss-llfyU?·ium heb1·ida1"um-found only m Scotland ~~d 1he Atlantic Islands; and one of the Hcpaticre-JI!Ictstigopham woodsu-:[ uund in Ireland and the Himalayas, the genus being most developed m New Zealand, and unknown in any part of continental Europe. These arc certainly very interesting facts, but they are by no means so exceptional in this group of plants as to throw any doubt upon their accuracy. The Atlantic islands present very similar phenomena in the Rhamphidium purpuTaturr:, whose nearest allies are in the West Indies and South Amenca ; and in three species of Sciaromium, whose only allies arc in New Zealand, Tasmania, and the Andes of Bogota. An analog~us and equally curious fact is the occurrence in the Dronthe1m mountains, in Central Norway, of a little group of four or five peculiar species of mosses of the genus Mnium, which are fou1~d nowhere else; although the genus extends over Europe, India, and the southern hemisphere, but always represented by a very few wide-ranging species except in this one mountain group! 1 1 I am i11dcbLctl to 1\1;·, Mitten for tlli !:l curious fact. |