for the Microscope. 61 



434. MEALY SCALE-MOSS (Trichocolea tomcntelld). In 

 very pale-green patches in moist places. Leaves divided 

 and subdivided in a compound manner into thread-like 

 branching segments. 



435. WHITISH SCALE-MOSS (Jungermannia albicans). 

 Very common on moist banks in a loamy soil. Leaves 

 with a pellucid mark in the centre of each lobe. 



436. MAIDENHAIR SCALE-MOSS (Calypogeiatrichomanes). 

 Common in moist woods, on moors, &c. Leaves 

 rounded, with smooth edges. Fruit capsule twisted. 



437. SPORES OF LYCOPOD (Lycopodium davattmi). 

 This is the largest species of British Lycopod, and 

 bears the spores like a yellowish-white dust within the 

 scales of club-shaped heads. The spores are somewhat 

 angular. 



438. SPORES OF MOUNTAIN LYCOPOD (Lycopodium 

 alpinuni). A common Lycopod in Alpine regions. Smaller 

 than the last, often growing with it. Spores obtusely 

 triangular. 



439. LICHEN SPORE (Urceolaria scruposa). The fruit 

 of lichens is usually borne in little cups (apothecia). A 

 section exhibits the asci, or long transparent membranes 

 containing eight spores. The asci are side by side, mixed 

 with barren threads. The spores in this species are very 

 fine. (PL VI., fig. ii ; spore.) 



440. LICHEN SPORE (Leptogium laceruni). In this 

 instance the spores differ considerably from the last, being 

 elliptic with pointed ends and many transverse divisions. 

 (PI. VI., fig. 12.) 



441. SACCATE LICHEN SPORE (Solorina saccata). The 

 spores of this not very common lichen are uniseptate, or 

 divided by one partition, and the surface is rough. (PI. 

 VI, fig. 37-) 



442. LICHEN Ascus (Cahcium turbinatuni). Our figure 

 exhibits one of the asci, or spore-sacs, of a lichen, with 

 its eight spherical brown spores and a single barren 

 thread. Found on old bark. (PI. VI., fig. 38.) 



443. Ascus AND PARAPHYSES (Collema pulposuni). 

 This is a gelatinous kind of lichen when moist, and the 



