STICTA. 



185 



low brownish-tomentose, with white gibbi ; lacinise broad, 

 rotundate-lobate ; apothecia normally superficial, but rare. 



Habitat : mossy and damp trunks of trees in subalpine 

 woods. * We have found it abundantly on the shores of 

 Loch Louiond, and have specimens in good fructification 

 from Inverary. It also occurs among moss on rocky ground 

 on the Pentland and Malvern Hills, and similar localities. 

 This species has been found on the Himalayas. Its spores 

 are fusiform and much elongated, bilocular or uniseptate, 

 pale yellow, resembling those of Peltigera, which genus 

 this species also resembles in the structure of its vegetative 

 system. We have found fusiform elongated spores in some 

 New Zealand and other foreign species which we have 

 examined. The spores of most of the British Stictas are 

 similar in general characters to, but intermediate in size 

 and form between, the long, narrow, almost linear, fusiform 

 spores of S. scrobiculata and the broadly ellipsoid, short ones 

 of S. pulmonaria ; they are also intermediate in size and 

 form between the spores of Peltigera and Solorina. In the 

 young as well as the old state the spore-cell contains an 

 amorphous mass of granular matter. 



** Thallus below excavated by white cyphellcB, 



3. Sticta limb ata (limbus, a border). Thallus mem- 



