PLATE III. 



FIGS. PAGE 

 13. Spirotsenia minuta Thur. 1 and 2, x 520 ; 



3, after Liitkemuller, x 500 . 41 



4-6. Sp. eboracensis G. S. West, x 520 . . 42 

 7-12. $p. ulwitrti. Halt's. 7-11, after Liitkemiiller, 



x 500; 12, x 400 . 44 



IS.Sp.bispiralisWest. x 400 . . 45 



14-15. Sp. at-uta Hilse. x 520 . 46 



16-17. ? tip. tenerrima Arch, x 520 . 47 



1819. Mesotsenium De Grvyi Turn. After Turner, 



x 500 . . 49 



20. M. De Grc.i/i var. hn-vc. West. x 400 . 50 

 21. M. De Greiji forma 'major West and CI. S. West. 



x 400 . . . .49 



22. M. De Greyi forma tvim-ix West & G. S. West. 



x 520 . . . . 50 

 23-24. If. Kramstai Lemm. 23, x 520; 24, after 



Lemmermann, x 305 . . .57 



25-26. M. pnrpurenm West & G. S. West. x 520 . 55 



27-33. M. violas-cents De Baiy. After De Bary, x 390 55 

 34-36. M. macrococcum (Kutz.) Roy & Biss. After 



DeBary, x 390 . . .51 



