29!^ Rev. W. A. licighton on the British Umbilicarise. 



Umbilicaria proboscidea, ^. cylindrica, Fries! L. Reform. 356 (1831); 



SummaV. Scand. 117- 

 Gyromium cylindricum, Wahl. Fl. Lapp. 483 (1812) ; Fl. Suec. 857. 

 Gyrophora proboscidea u, Turn. & Borr. ! Lich. Brit. 219 (1813). 

 Umbilicaria poly morpha, «. cylindricaA. & D, Schser. Spic. 86(1823-3(1) ; 



a. monophylla, Exs. 143 ! ; b. polyphylla, Exs. 146 ! ; a. crinita, & 



d. Jimbriata, Enum. 26. 

 Gyrophora crinita, Chev. Fl. Paris. 1. 644 (1836). 

 Umbilicaria cylindrica, Tuckerm. Syn. 71 (1848) ; Nyl. N. Class. 175. 

 varia, var. proboscidea, Leiglit. Brit. Lich. Exs. 95 ! 



On Snowdon on the rocks called Llyn Llydaw, and near Llyn 

 Cwm y Ffynnon tas; also on the summit of the mountains 

 from Cwm Brwynog towards Ardhu near Llanberris. On lofty 

 rocks of the Berwyn Mountain, Dillenius. Rocks on the High- 

 land mountains, as on Goatfield in the Isle of Arran, on the 

 mountains of Breadalbane, Ben Nevis in Lochaber, Lightfoot. 

 On rocks in the mountainous parts of Dartmoor, Devonshire, 

 Mr. Newberry. Summit of Carnedd Llewellin, Mr. Griffith. 

 Scotland, Wales, and North of England, Sir J. E, Smith. On 

 Cheviot, Mr, Winch. Near the summit of Hedgehope, North- 

 umberland, Dr, G» Johnston. On rocks at Connavalla, Ireland, 

 Dr, Whitley Stokes. On Mangerton, Ireland, Dr. Taylor. Rocks 

 about Loch Phadrick ! rocks Stroine-dhu ! summit of Carlowrie ! 

 Mr. W. Gardner in herb. Borrer. Birkdale, Westmoreland ! 

 Mr. W. Robertson in herh. Borrer. Clova ! Mr. G. Lawson, 

 Scawfell ! Mrs. Joshua Stanger. Yorkshire ! Mr. G. Dixon. 

 Summit of Arran Mowddy ! Mr. Borrer, Falcon Clints, Tees- 

 dale, CO. Durham ! Mr. W Mudd, 



" Thallus peltate, ascending, composed usually of numerous 

 imbricated curled leaves, attached to the rock by a thick central 

 callous disk, which is sometimes drawn up into a sort of stalk, 

 whence they spread in nearly a circular form, making patches 

 of 1 or 2 inches in diameter : the leaves, taken individually, vary 

 in shape from orbicular through every intermediate degree to 

 cuneiform, and are divided very irregularly, some down to the 

 centre, others slightly, into rounded lobes, the edges of which 

 are crenate or dentate, and everywhere fringed with black 

 branched compressed fibres, a line or two long, composed of the 

 substance of the thallus itself, so that they may perhaps most 

 properly be regarded as elongated teeth, though they have en- 

 tirely the appearance of cilia of a difi'erent substance : these, from 

 the remarkably undulated mode of growth of the edges of the 

 thallus, often look at first sight as if they were disposed in two 

 or three rows : the upper surface is of a dull greenish-brown 

 when moist; and of a smoky-grey, with a pruinose appearance, 

 and sometimes speckled with white, when dry ; always roughish 

 with minute elevated reticulations of the cuticle, very visible in 



