90 REPORT — 1856. 



/3. \ar. pulverulentus. Apothecia sparingly or copiously green-pulverulent. 



[A. Smithii, Tul. in part, and A. Welwitzschii, TuL] 

 8. var. microspermus. Spores small and pale. 

 lA. microspermus, Tul.] 



Habitats. I. Parasitic on furfuraceous states of Parmelia saxatilis, chiefly on old 

 roadside walls, less frequently on boulders, rocks, and trees. Craigie Hill 

 and MoncriefF Hill, Perth : Craig-y-Barus, Birnam Hill, and Amulree Road, 

 Dunkeld : Caerlaveroch Road, Dumfries : Ben Lawers : Glen Shee and Glen 

 Clunie : Braemar : Fort-William and Ben Nevis: banks of Crinan Canal : 

 Glen Sligachan, Portree, Broadford and Uig. Skye : Wrekin Hill, Shropshire: 

 var. a. [Leighton's Lich. Brit, exsicc. No. 46. Fasc. 2. 7 : Barmouth, North 

 Wales, Rev. W. A. Leighton.] 



n. On Stictafuliginosa : rocks. New Cut, Meadfoot, Torqua}', Devonshire [Leight. 

 Lich. Brit, exsicc. No. 191. Fasc. 6.], var. /3. 



Species H. A. oxysporus Tul. emend. Apothecia not prominent: chiefly im- 

 mersed: flattened or discoid: blackish-brown: generally crowded. TheccB : 

 amyloid reaction with iodine distinct. Parapliyses : tips light brown. Spores 

 ellipsoid, acute at ends, colourless or pale yellow, normally containing two yel- 

 lowish globular nuclei, placed at opposite ends of the spore. 



Habitats. I. Parasitic on furfuraceous states of Parmelia sa.ra/«7/s, generally asso- 

 ciated with the preceding species in most of the stations already mentioned. 



n. On Parmelia conspersa, Barmouth, North W^ales, Leighton. 



JIL On Cetraria glauca, Barmouth, Leighton. 



Mr. M. Masters exhibited a specimen of an abnormal growth in a rosewood-tree. 

 The specimen consisted of two root-like organs which had been found in the hollow 

 of a trunk of the rosewood-tree ; the root-like branches having descended from the 

 upper part of the cavity in the trunk, and descended and penetrated into the bottom 

 of it. 



On the Flora of the Crimea. By Dr. Michelsen. 



On the Geography of Breadstuff s. By Dr. Michelsen. 



Notice of the Natural Printing of Sea-Weeds on the Rocks in the vicinity of 

 Stromness, Orkney. By Charles W. Peach. 

 The author found, on the rocks near Stromness, by the sea-side, distinct impres- 

 sions of living Algae, Desmarestia ligulata, Halidrys siliquosa, Fucus nodosus, and 

 several others. It appeared that in some cases the stone (micaceous Old Red Sand- 

 stone) had been covered by a Leathsia ?, that this was corroded by the larger sea- 

 weeds, so that their forms appeared slightly impressed, and of a yellow colour. In 

 other cases no preparatory growth of Leathsia was observed, but the stone was 

 slightly excavated, and darkened in colour. The author showed the bearing of this 

 observation in cases of plant-like forms in the Lower Palaeozoic strata of Cornwall, 

 where no trace of carbonaceous matter appeared. 



Zoology. 



A Notice of some New Genera and Species of British Zoophytes. 

 By Joshua Alder. 



The paper contained descriptions of thirteen new species, found by the author on 

 the coasts of Northumberland and Durham. They include two new genera, and 

 another genus not before recorded as European. They are as follows : — Voriidava, 

 a new genus allied to Clava, but differing in having the tentacles in two regular circles 

 round the head, and dissimilar. The species F. humilis has five tentacles in the 

 upper row, and ten in the lower. — Eudendrimn confectum, a small species encrust- 



