for the Microscope. 59 



of chlorophyl, or green colouring-matter, making them 

 very attractive objects. Of course they are brightest and 

 best when examined in a fresh state. 



416. HYPNUM CELLS (Hypnumrutdbuluni). The cells 

 in these leaves are rhombic, with the ends pointed, and 

 are in length several times their diameter. This kind of 

 areolation is of the same type as in fig. i, but differ in their 

 length. The moss is a common one. (PI. VI., fig. 2.) 



417. POTTIA CELLS (Pottia truncata). The areolas of 

 this pretty little moss are hexagonal and dotted. Their 

 length scarcely exceeds the diameter. (PI. VI., fig. 3.) 



418. CUSHION Moss CELLS (Grimmia apocarpa). 

 Somewhat similar but smaller cells than the foregoing. 

 Many species of Cushion Moss are common on old walls, 

 roofs, &c, and in the majority of them the cell-structure 

 possesses this character. 



419. DOUBLE PERISTOME (Mnhim Jiornum). The 

 peristome surrounds the capsule like a fringe, and in this, as 

 in many other species, it is double. The teeth are vari- 

 able in different species, and the outer series is often richly 

 coloured. They are best mounted dry. (PI. VI., fig. 4.) 



420. TWISTED PERISTOME (Tortula ruralis). This 

 moss is common on walls and thatched roofs. The 

 Twisted Peristome affords a good example of this kind of 

 object. (PI. VI., fig. 15.) 



421. SPIRAL CAPSULE (Eucalypta streptocarpa). Un- 

 fortunately, this moss is more often found barren than 

 with capsules ; these are cylindrical and spirally striated. 

 The moss occurs in the fissures of rockg and on old walls. 

 (PI. VI., fig. 33.) 



422. BRISTLE Moss PERISTOME (Orthotrichum offing. 

 The species of Orthotrichum are difficult mosses for a 

 learner to name ; but this is common enough on trunks of 

 trees, and almost any species furnishes a good peristome. 



423. BOTTLE Moss (Splachnum sph(zricuin\ This is 

 the most common species of the genus, and is found in 

 moist places and Alpine stations on the dung of animals. 

 The capsules are very characteristic. (PI. VI., fig. 30.) 



424. HYGROMETRIC Moss (Funaria hygrometrica). 



