120 SHORT NOTES. 



A very well-marked species. Easily known from C. pulposum, 

 when moist, by the difficulty of removing a perfect tuft, as it 

 breaks up into a number of pieces ; when dry its angular lobes 

 and reticulated surface serve to distinguish it. 

 L. TURGIDUM (Ach.) 



On old mossy walls, and in chalk-quarries ; frequent. 



Walls near Maidstone ; Wrotham ; Westerham ; Postling ; 

 Newington, near Sandgate, sparingly. 



A form of this plant, like Collema confertum, with closely- 

 packed apothecia, occurs on a flint wall between Chelsfield and 

 Down. 



L. ScHEADERi (Bernh.) 



On mud-capped limestone walls, amongst mosses, and on rubble- 

 heaps in chalk-quarries ; frequent. The apothecia are rare. 



Near Chelsfield ; Wrotham ; Shoreham ; Folkestone ; near 

 Otford, with a few apothecia (January.) 



In the sterile state this may be known from L. turgidum by the 

 thalline lobes being dilated upwards so as to be somewhat wedge- 

 shaped in outline, and when fertile by the apothecia being lateral 

 instead of terminal, as in L. turgidum. 



L. MICROSCOPICUM, Nijl. 



On chalk stones or greensand rocks ; rather rare. 



Fant Woods, near Maidstone ; sterile. 



Differs from L. cretaceum in its more erect habit and denser 

 mode of growth, and from L. subtile in the lobes of the thallus 

 being more cylindrical and less broad. 



Pyrenidium actinellum, Xyl. 



On chalk ; very rare. 



Boxley Hill ; Admiral Jonex, 1865. 



I have repeatedly searched this locality in vain for this Lichen. 

 Admiral Jones' specimen in the British Museum has no apothecia 

 upon it. 



( To he continued, j 



SHORT NOTES. 



Chara connivens, " Sahm,'' A. Braun. — There is a plant in 

 the Kew Herbarium, labelled " in fresh water ditches at Stokes 

 Bay, Gosport, Rev. W. S. Bayton, 1828," which apparently 

 belongs to this species ; the specimen being small and imperfect, 

 renders it difficult to determine satisfactorily. It closely resembles 

 one of Kralik's Tunisian specimens (no. 344 bis), and, like it, 

 differs from the typical form, in having rather shorter nucules 

 and slightly longer bracts. This species should be looked for in 

 the southern counties. It may be roughly distinguished from 

 C. fragifera, its nearest ally, by its incurved branchlets and brittle 

 character ; from C. aspera and C. galiuides, by the total absence of 

 spines ; and from ('. fr^igilis, by being dicecious. — H. & J. Groves. 



