for the Microscope. 13 



92. WAKE-ROBIN STARCH (Arum maculatuni). The 

 starch of the common Arum consists of very small gran- 

 ules, which are either circular, muller-shaped, or polyhe- 

 dral. The circular hilum lies in a small depression. 



93. HORSE-CHESTNUT STARCH (sEsculus hippocasta- 

 num}. Granules oval or elliptical, very variable in size, 

 but much more regular in outline than the next. (PI. I., 



% 57-) 



94. ACORN STARCH (Quercus pedunculatd) . Granules 

 irregular, and variable in form and size, sometimes pear- 

 shaped, egg-shaped, or oval, but usually with no definite 

 typical form. Markings very faint. (PI. I., fig. 58.) 



95. GINGER STARCH. Granules rather large, egg- 

 shaped, with the smaller end abrupt and irregular, as if 

 bitten off. Concentric rings very faint, scarcely visible. 

 (PL I., fig. 59.) 



96. WEST INDIA ARROWROOT. The granules are 

 smaller than in Tons les mois, narrow and tapering, fre- 

 quently terminating in an obtuse point, sometimes with 

 warts or knobs scattered over the surface. The concen- 

 tric rings are few and faint. 



97. TAPIOCA STARCH. The granules in this starch are 

 muller-shaped ; when seen endways they appear circular. 

 There is a circular hilum or slit, and a few faint concen- 

 tric rings. 



98. SAGO STARCH. The granules are irregularly ellip- 

 tical, generally more or less broken, with a circular hilum, 

 and a few faint concentric rings. 



99. EAST INDIAN ARROWROOT. The granules in this 

 starch are long, narrow, and shell-shaped. The hilum is 

 an indistinct ring at the narrow end of the granule. The 

 lines on the surface only form broken segments. 



100. CROCUS STARCH. Starch granules from the bulbs 

 of the Crocus are of a very compound character, from 

 three or four to six or seven, or more, being united together 

 in an irregular mass, so that when separated into their 

 individual granules they are, as the result of compression, 

 very variable in form. 



01. SHERARDIA POLLFN (Shcrardia arvensis). The 



