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1895- 



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EXPLANATION OF PLATES IX-XII. 



The drawings were made with a Bausch & Lomb microscope. For Figs. 

 70-76 and Figs. 84-91 and Fig. 93b, a Number 2 ocular and J4 objective. 

 For Figs. 77-83, a Number 2 ocular and /.^ immersion objective. With 

 Figs. 92-9S and Figs. io6a, no and in, a i{ ocular and 2, objective. For 

 Fig. 93 a Number 2 ocular and % objective. The reduction is not .so great 

 as in the preceding parts and therefore the figures are proportionately 

 slightly larger. The diagrams were not made upon a definite scale. The 

 numbering of the drawings is continuous with the preceding parts. 

 At)bieviatioiis : e. epidermis. mi.— nutritive zone. 



ep. — epidermal zone. f. v. b.— fibro-vascular bundles, 



pa. — parenchyma zone. 1. c. — larval chambers, 



p. — protective zone. sc. — sclerenchyma. 



FtOWER AND FRUIT GAI.I.S. 

 70. Section of leaf of Euphorbia corollata. 



71a. Diagram of .section of Phytoptus sp gall on leaf of Iv corollata. 



71b. Section of 71a. 



72a. Section of lower part of ovary of H. corollata affected by I'hytoptus sp . 



