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EXPLANATION OF PLATE. 
Figs. 1, 2, 3. \'arious aspects and magnified sculpture of 
Tlirr.'iifes: hasedowi, Hedley. 
Figs. 4, 5, 6. Various aspects of Xanthonielon radiatum, 
Hedley. 
Figs. 7, 8, 9. Various aspects of XantJiomeloji suhlevatum, 
Tate. - 
Figs. 10, 11, 12. Various aspects of Xanthoinelon clydoni- 
geruni, Tate var. 
