PLATE V. 



PIG. 22. Common large colourless corpuscle of the newt, a to h. Successive forms assumed by the same 

 cell in the course of an hour, iu a preparation enclosed in oil, without the addition of any reagent, p. 3. (Hart" 

 nack: Ocular, No. 3; Objective, No. 8.) 



FIG. 23. A granular corpuscle in the same preparation, o to h. Successive forms assumed by the same cell 

 in the course of fifteen minutes, p. 5- (Ocular, No. 3; Objective, No. 8.) 



FIG. 24. a and 6. Coloured blood corpuscle of the"\newt, after the addition of 2 per cent, boracic acid, 

 showing the zooid and ojeoid. e. Coloured corpuscle of human blood, after the addition of 2 per cent, tannin 

 solution, showing the zooid and cecoid. d. Coloured corpuscle of newt's blood, after the addition of diluted 

 acetic acid. c. The same, treated with water, and then subjected to the action of CO2. /. The same. A small 

 quantity of C02 IIHH been added to it, after it had been rendered pale by treatment with water, g. Colourless 

 corpuscle of newt's blood, after the addition of dilute acetic acid. * ft. Colourless corpuscle of huiuaij blood, after 

 the addition of dilute acetic acid. pp. 13-15. (Oc., 3; Obj., 8.) 



