22 One T lion sand Objects 



nutely granular. Some seeds are white, others brown, 

 with intermediate shades, very singular. (PI. II., fig. 46.) 



1 60. RED-WOOD SORREL SEED (Oxalis roseci). Ovoid, 

 with pointed ends, and five or six angular longitudinal 

 ribs, jointed by numerous transverse bars. Dull, pal( 

 ochraceous yellow. (PL II., fig. 47.) 



1 6 1. VENUS' LOOKING-GLASS SEED (Campanula specu 

 Inni). Small almond-shaped seeds, of a pale brown 01 

 amber colour, and smooth glossy surface. Interesting for 

 comparison and contrast with the others named. 



162. CELERY SEED (Apium graveolens). This is an 

 excellent type of the order to which it belongs. The five 

 longitudinal ribs are very clear and distinct, and its small 

 size renders it a good representative of the carraway, 

 cumin, and anise kind of seed. 



163. BLUMENBACHIA SEED (Blnmenbachia insignis). 

 This is rather a large seed for the microscope, but one 

 which cannot be omitted from a collection. Its irregular 

 form and gnarled and distorted testa defy description 

 within any reasonable limits. 



164. FRUIT OF ELM (Ulmns montand). These are 

 large and well-known winged seeds. If well soaked in 

 turpentine and mounted in balsam, the encircling mem- 

 brane becomes transparent, and almost equal to the 

 winged seeds of some Bignonias. 



DESMIDS. 



These minute fresh-water alga;, or water-weeds, are of 

 a beautiful green colour and elegant form. Every boggy 

 pool or swamp may be expected to contain them, and 

 they often flourish on the surface of damp rocks. Often 

 in company with fresh-water diatoms, they will be found 

 in similar stations ; but, unlike them, they have no flinty 



